Selected articles for topic: rfid reader antenna
→ 908 articles
Check also 115 Videos for this topic
RFID on Android - Part 2 - SDG Blog
RFID on Android - Part 2
Posted by admin at 2:25 PM on Jan 20, 2014
Share:
Android Capabilities Needed for Enterprise RFID
In the first article of this series, we provided a brief description of Android's use of RFID. As part of that discussion, we pointed out that Android, by default, supports RFID solely through its implementation of NFC. We also pointed out that, although NFC expands the use...
Website:
https://sdgsystems.com
Related topics : types of rfid tags and readers / rfid tag reader android / rfid tag read range / uhf rfid tag reader / rfid tag reader software
Supply Chain Management And Rfid in Retail Industry ...
Radio Frequency Identification for supply chain management in retail industry.. :�
Radio Frequency Identification for supply chain management in retail industry.. Presented by..., S. SYED NIZAMUDEEN
What is RFID? :�
What is RFID? Radio Frequency Identification RFID is the use of small devices that can be electronically identified at a distance, through many obstruction, using radio...
Website:
http://www.authorstream.com
MotoTRBO RFID Fleet Management System
The MOTOTRBO RFID fleet management technology lets you quickly, accurately and simultaneously check radios in and out. Unlike bar codes inside a radio or tags glued to the exterior, the RFID tag is hidden inside the volume knob. When you wave the RFID reader next to any number of RFID-equipped radios, it automatically reads each unique ID, efficiently tracking all of them. The RFID tag fits inside the volume knob, which can be installed on the radios you already have. It's safe, secure and easily scanned. You never have to...
Website:
http://tricountycom.net
Related topics : epc gen 2 rfid tag / rfid tag reader system / gen 2 rfid tag / rfid security tag reader / rfid tag reader software
My Active RFID - ELA innovation
My Active RFID
My Active RFID
Discover all�ELA Innovation RFID Active products. Do you have identification or location needs? Our tags and badges are made for you!
In addition, our range of wireless sensors adapts to all...
Website:
https://elainnovation.com
Related topics : long range active rfid tags / active rfid tag range / long range active rfid reader / long range active rfid / active rfid tags locator
Evidence Technology Magazine - RFID for Evidence Tracking ...
RFID for Evidence Tracking and Accountability
Written by Kathryn Bankston Smith, CDIA+
Baker, LA. is the third-largest municipality within Baton Rouge Parish, with a population of 14,500, and a police force of 45 officers. Baker Police Department uses two vaults for the storage and tracking of criminal evidence. They are holding up to 9,000 pieces of evidence at any given time.
As with...
Date: 2017-12-10 00:24:59
Website:
http://www.evidencemagazine.com
The Application Of RFID Technology In Library | STARNFC
The RFID intelligent library management system is composed of RFID smart tag (RFID TAG), intelligent detection antenna, administrator reader, automatic lending desk, handheld reader and application software.
1smart tags can provide convenient data management, and has anti-theft protection function; intelligent detection antenna mainly provides the entrance security work, it can accurately...
Website:
starnfc.com
Techsolutions | RFID @ Work
Services »
Techsolutions is a leading supplier of solutions for Asset Tracking and Asset Management. SmartAsset is our core solution and is the ideal solution for keeping your asset register up to date, by linking each physical asset and its location to its financial information. SmartAsset is Cloud based and have...
Date: 2016-10-13 07:29:54
Website:
http://www.techsolution.co.za
Related topics : active rfid tag in real time location system / rfid based asset management solution / rfid asset management solutions / rfid for asset tracking and inventory management / rfid based asset tracking solution
13.56Mhz USB RFID Reader/Writer Module - emartee.com
Video
13.56Mhz USB RFID Reader/Writer Module
RFID frequency identification is a non-contact object recognition technology, it can automaticlly recognize target and get relevant data through rf signal, so there are so many interactive projects which need to use RFID to achieve object recognition. Generally speaking, one basic kit of RFID general system mainly consists of three parts :
Tag :...
Website:
emartee.com
Related topics : rfid card reader writer usb / usb rfid reader writer / rfid reader module arduino / high frequency rfid reader module / rfid smart card reader writer
Positek RFID | Solutions Provider for the Textile and ...
Close Menu X
Experience, Partnerships and Relationships
As the most-experienced RFID solutions provider to the textile industry, Positek RFID offers a full line of RFID-related products including tags , readers , antennas , custom software solutions , freestanding portal readers , bundle readers and custom tunnel readers to fit any operation and work environment. Positek RFID tracking technology...
Website:
http://www.positekrfid.com
Impinj Acquires Intel's UHF RFID Reader Chip Operation
For developers of UHF RFID readers and reader-modules, the R1000 chip provides superior levels of design flexibility, integrating onto a single chip 90 percent of the components required for a reader radio. By delivering unprecedented performance, integration and cost effectiveness to a worldwide customer base, the R1000 chip enables all reader form factors -- fixed, mobile, embedded and others...
Date: 2008-07-09 18:02:36
Website:
intel.com
Cottonwood: TTL UART Long Range UHF RFID reader (ISO18000 ...
Find answers in product info, Q&As, reviews
Please make sure that you are posting in the form of a question.
Don't see what you're looking for?
Ask the Community
There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews
Product description
Long Range UHF RFID Reader is an important way to read information and input...
Website:
https://uedata.amazon.com
Alien Technology Partners to Develop World's First RFID ...
Tweet
Share
http://www.alientechnology.com/), an industry leader in Radio Frequency Identification (RFID) Ultra High Frequency (UHF) products and services, today announced the availability of the world's first RFID reader network application for the Apple iPhone." data-reactid="5">MORGAN HILL, CA--(Marketwire -08/21/12)- Alien Technology ( http://www.alientechnology.com/ ), an industry leader in...
Website:
https://www.yahoo.com
Related topics : alien technologies rfid reader / alien technology rfid reader / radio frequency identification technology (rfid) / radio frequency identification technology rfid / alien technology rfid solutions center
Feig - High Frequency Readers / Modules / Antennas - Fast RFID
OBID i-scan HF Mid Range Antennas
for deployment with OBID i-scan HF Mid Range Reader for identification of 13.56 MHz tags
Variable deployment due to different antenna concepts (Pad Antenna, Industrial Antennas)
The deployment together with OBID i-scan HF multi-tag readers allows to read different ISO15693/ISO18000-3 tag types simultaniously
ID ISC.ANTS370/270 Shielded HF Pad Antenna
Dimensions : 376 x 276...
Date: 2016-06-22 11:49:03
Website:
http://www.fastrfid.com
Related topics : hf rfid reader range / hf rfid reader antenna / high frequency rfid reader module / hf rfid reader module / hf rfid tag antenna
Smallest RFID Tags - D.O RFID Group
The applications of our tiny RFID tags are required for any small size tracking.
The RFID tag with cooper antenna, so the performance is better than AL antenna. The read range is 0.5-3cm,...
Website:
https://www.dorfidreader.com
Related topics : rfid tag read range / small rfid tag reader / rfid tag size / rfid tag application / tiny rfid tags
Lexmark Adds RFID to Laser Printers - ThingMagic.com
Lexmark RFID Enables Laser Printer Using ThingMagic's M5e Embedded RFID Reader
Lexmark International, Inc. recently announced the Lexmark RFID UHF Option, which is designed as an add-on for Lexmark T640, T642 or T644 monochrome laser printers. The option contains an embedded RFID reader and antenna that programs and verifies RFID media and provides an easy and affordable way for customers to add RFID capabilities to their existing printing infrastructure.
The Lexmark RFID option is equipped with an embedded ThingMagic M5e UHF RFID reader integrated into the printer drawer assembly, enabling customers to use their existing T64x laser...
Date: 2017-03-04 01:10:31
Website:
http://www.thingmagic.com
Related topics : rfid label printer cost / embedded uhf rfid reader / rfid tag printers / rfid tag printer / uhf rfid printer
RFID tag antenna based temperature sensing - researchgate.net
Email: rahul b, floerkem and sesarma@mit.edu
Abstract--Temperature monitoring is important in a num-
ber of fields, particularly cold supply chain applications. Most
commercial wireless temperature sensors consist of transceivers,
memory and batteries to maintain a temperature time history but
this is expensive and allows for limited sensor deployment. In this
paper, we propose a low cost...
Date: 2016-11-23 11:26:46
Website:
https://www.researchgate.net
Related topics : rfid tag antenna based temperature sensing / rfid tag temperature sensor / long range passive rfid tag for sensor networks / dipole antenna design for uhf rfid tags / antenna design for uhf rfid tags
Alien Higgs 3 - TECTUS Professionelle RFID Sytem ...
Industrial Mobile RFID MultiPen reader LF, HF, NFC, UHF
The MultiPen is an innovative Mobile RFID/NFC Reader, with capability of reading UIDs of passive RFID TAGs with various frequency combinations. The MultiPen allows to transfer UID reads via Bluetooth to the host-computer (Tablet, Laptop or Smartphone). It is also possible to store the UIDs in the integrated data base of the MultiPen....
Date: 2017-12-10 02:07:49
Website:
http://www.tec-tus.de
Document Tracking Solutions with RFID Technique at TrackSeal
RFID document tracking also facilitates asset inventory and loss prevention.� With RFID-tagged assets, accounting for all assets is now an automatic and, depending on the implementation, real-time activity versus a manual listing activity that takes days or is do costly that it never happens.�
How It Works
A smart label with a unique RFID tag is applied to each document, file folder, tube or box.� Employees use RFID handheld readers to...
Website:
http://www.trackseal.com
RFID Portal - Gateway RFID Store
menu
RFID Portal
RFID portals are designed for entrances, gates, doors, and hallways where a RFID reader is needed. The portal can actually scan RFID tags as they move into and out of an entrance. This is especially important in areas where tagged items are either entering or being removed from an area and need to be catalogued quickly.
How RFID Portals Work
RFID portals work similarly to other RFID technology. Like other readers, they have a transceiver and an antenna. The transceiver generates a weak radio signal that has a range of a few feet. This then activates a RFID tag...
Website:
https://gatewayrfidstore.com
Related topics : rfid portal reader / rfid portal design / rfid portal gate / rfid portal antenna / portal rfid
RFID readers with integrated antennas - Cisper
Request Quote
Intellifi Smartspot
Intellifi Smartspots combine modern identification technologies RAIN RFID (UHF) and Bluetooth Low Energy with web based services to enable new localization applications and create enhanced user interaction. All Smartspots can be equipped with RAIN RFID (UHF), Bluetooth Low Energy 4.0 (BLE) technology or a combination of both. The Smartspot is the most standard version of the product family and is equipped with a powerful dual...
Website:
cisper.nl
Related topics : uhf rfid technology and its applications / bluetooth uhf rfid / uhf rfid reader antenna / uhf rfid technology / uhf rfid antenna
Alien® Unveils New Handheld RFID Reader with All-Day ...
SAN JOSE, Calif., Jan. 10, 2018 (GLOBE NEWSWIRE) -- Alien Technology® , a leader in Radio Frequency Identification (RFID), today announced the new ALR-S350 RFID reader, which will make its debut at the NRF 2018 show (Booth 322) next week in New York. The ALR-S350 will be showcased along with additional Alien RFID solutions, including the new Hydra Series , that help retailers and supply chain...
Website:
https://finance.yahoo.com
Passive RFID | RFID Discovery
Benefits of passive RFID
Passive radio frequency identification (RFID) technology provides a cost-effective solution to automatically identify and locate large numbers of assets or stock in a variety of different organisations including healthcare. In hospitals passive RFID labels can significantly reduce the timespent on checking inventory and locating specific equipment, improving inventory...
Website:
http://rfiddiscovery.com
Related topics : uhf passive rfid tag reader / rfid active reader passive tag / rfid passive tag reader cost / uhf rfid passive reader / passive rfid tag and reader
RFID Chip Module Test Unit - deciphe-it.com
The RFID Chip Module Test Unit connects via test pins to the RFID Chip Module when mechanical pressure (e.g. created by a motor or an air pressure cylinder) puts the test pins on the RFID Chip Modules which are typically on...
Website:
deciphe-it.com
Related topics : how to test rfid module / rfid reader module / rfid controller chip / rfid reader chip / rfid module
How to Block RFID Signals, Build an RFID Reader Detector ...
RFID chips are everywhere. They're in passports, credit cards, and tons of items you've bought in the last 5 years or so. Big retailers like Walmart started using tracking products with RFID as early as 2004, and today, they're used in everything from mobile payments to hospital record systems. Chances are, unless you're a hermit (in which case you wouldn't be reading this anyway), there's an...
Website:
https://mods-n-hacks.gadgethacks.com
Library Automation Using RFID ~ Computer Science and ...
In the ensuing discussions we will see how RFID technology is recommended for library automation. RFID technology is not just there to tags books and other library assets; it will provide a comprehensive route for enhancing all library services and upgrade operations for everyone concerned with the library.
Issues: During a day, library managers have to supervise many activities within their...
Date: 2017-02-01 17:35:39
Website:
http://necsea.blogspot.com
Related topics : library shelf management system using rfid technology / rfid tag library management system / smart library management system using rfid / rfid library system technology / rfid library management system video
Rfid Circuit Diagram - Wiring Diagram Gallery
Rfid Circuit Diagram"
Rfid Circuit Diagram 125Khz Rfid Module - Uart(Low Price Edition) * Sigmatechbd
Rfid Circuit Diagram Interfacing Rfid With Arduino - How To Read Rfid Cards
Rfid Circuit Diagram Rfid Based Security System Using 8051 Microcontroller
Rfid Circuit Diagram Active Rfid Diagram -...
Website:
https://wirindiagrampedia.com
13.56MHZ RFID Reader/Writer Module - emartee.com
13.56MHZ New RFID Reader/Writer Module
RFID� frequency identification is a non-contact object recognition technology, it can automaticlly recognize target and get relevant data through rf signal, so there are so many interactive projects which need to use RFID to achieve object recognition. Generally speaking, one basic kit of RFID general system mainly consists of three parts :
�
Tag : composed by coupling components and chip, every tag have only electronic coding, adhere to the target object identifier
�
Reader : equipment used to read...
Website:
emartee.com
13.56MHZ New RFID Reader/Writer Module - emartee.com
Video
13.56MHZ New RFID Reader/Writer Module
RFID� frequency identification is a non-contact object recognition technology, it can automaticlly recognize target and get relevant data through rf signal, so there are so many interactive projects which need to use RFID to achieve object recognition. Generally speaking, one basic kit of RFID general system mainly consists of three parts :
�
Tag : composed by coupling components and chip, every tag have only electronic coding, adhere to the target object identifier
�
Reader : equipment used to...
Website:
http://www.emartee.com
RFID: A Tool For Tracking Products, Assets And More | Food ...
RFID: A Tool For Tracking Products, Assets And More
by Elliot Maras On Dec 17, 2015
Photo credit: Barcoding Inc.
The facility map in the yard management solution by PINC Solutions gives East Coast Warehouse & Distribution visibility over its container locations.
The PINC Solutions yard management system includes a dashboard that allows East Coast Warehouse & Distribution to track assets.
The...
Website:
http://www.foodlogistics.com
Related topics : rfid tag data for products consist of the following information except / rfid tags product tracking / rfid solutions for supply chain management / use of rfid in supply chain management / achieving supply chain integration using rfid technology
Mifare RC522 MFRC-522 Card Read Antenna RF Module RFID ...
Have one to sell? Sell it yourself
Details about �Mifare RC522 MFRC-522 Card Read Antenna RF Module RFID Reader IC Card Module
Mifare RC522 MFRC-522 Card Read Antenna RF Module RFID Reader IC Card Module
geniusartgallery has no other items for sale.
Item Information
More than 10 available / 17 sold
Please enter a quantity of $qty_dummy$ or less Please enter a quantity of 1 Purchases are...
Website:
ebay.com.au
Related topics : mifare rc522 rfid card reader / rf card reader module / mifare rfid card reader / rf card reader price / rf card readers
4W ISO15693 long range reader with 8 antenna port-RFID 13 ...
Product Description
CF-RH9048 is a high performance ISO15693 protocol HF tag reader. It is designed upon fully self-intellectual property. Based on proprietary efficient anti-collision algorithm, it supports fast tag read/write operation with high identification rate. It can be widely applied in many RFID application systems such as logistics, personnel identification,...
Website:
http://www.chafon.com
Related topics : rfid reader access control system / rfid hf reader antenna design / rfid tag reader long range / hf rfid reader long range / hf rfid reader antenna
RFID Equipment » Products » TPI » Experts in wireless ...
Click here to see all RFID products
RFID Overview
Radio Frequency ID (RFID) is one of the industry's hottest technologies. There are large amounts of information published on the subject, stemming largely from the recent announcements of interest from major companies like Wal-Mart, the Department of Defense, International Paper, and Proctor and Gamble.
Radio Frequency Identification (RFID)...
Website:
http://www.tpi1.com
RFID Solutions for Warehouse Management | RFID Systems
RFID or radio frequency identification is a system that transmits identity in the form of a unique serial number of a product wirelessly. RFID, a type of Auto-ID technology is used to reduce time and labor and improve real time data accuracy. Most commonly, an RFID tag consists of a microchip attached to a radio antenna mounted on a substrate. This technology connects products to the Internet for tracking purposes so that information can be shared with businesses across the...
Website:
https://www.datexcorp.com
Greenfuturz | RFID Solutions Hardware | rfid services ...
FX9500 RFID Reader 4/8 Port
RFID Amazing SOLUTIONS
The Following are some of the special solution in RFID
RFID Access control
RFID is a flexible technology that allows businesses to close the gap between acquiring data, converting it to meaningful information, and automating all associated transactions.It can provide traceability and real-time control to meet customer and regulatory requirements...
Website:
http://www.greenfuturz.com
How to program Cottonwood the RFID reader with USB and ...
According to the actual needs, this UHF RFID reader can be with the most suitable...
Website:
http://learn.linksprite.com
Related topics : usb uhf rfid reader / uhf rfid reader antenna / usb rfid reader / rfid reader uhf / rfid reader antenna
Times-7 | SlimLine RTAS UHF RFID Race Timing Antenna System
Race Timing Antenna System
SlimLine RTAS UHF RFID Race Timing Antenna System
The SlimLine RTAS is a complete high performance ground mat antenna system, which is fully optimised for race timing and event management applications.
Ready to be deployed in a matter of minutes, the RTAS offers true portability with fast and easy...
Website:
http://www.times-7.com
Related topics : uhf rfid timing system / uhf rfid reader antenna / uhf rfid antenna / uhf rfid system / rfid reader antenna
Small RFID Reader/Writer - SL031
Small RFID Reader/Writer SL031
The features of SL031 are identical as SL030 except for communication interface that IIC is for SL030 and SL031 uses UART. Developed based on NXP's low power transponder ICs, HF RFID module SL031 is a small...
Date: 2017-01-13 08:38:13
Website:
http://www.stronglink-rfid.com
Related topics : small rfid reader writer / mifare rfid reader writer / rfid reader mifare classic / small rfid reader module / rfid mifare classic 1k
RFID Reader ID-12LA (125 kHz) - RFID - Wireless - Modules
RFID (radio-frequency identification) is the wireless non-contact use of radio-frequency electromagnetic fields, for the purposes of identifying and tracking tags attached to objects. This...
Website:
http://www.exp-tech.de
Related topics : radio frequency identification tags (rfid) / rfid radio frequency identification tags / radio frequency identification (rfid) / 125 khz rfid tag reader / rfid 125 card reader serial output
The role of RFID in the smart factory
RFID technology will have a big role to play in the smart factory of the future, enabling 'things' to communicate in real-time with manufacturing systems.
In Europe we call it Industry 4.0, cyber-physical systems and the 'internet of things' (IoT). In America it comes under the umbrella of the Smart Manufacturing Leadership Coalition or the Industrial Internet. However, we are all alluding to the...
Website:
http://www.controlengeurope.com
President and CEO of Avery Dennison Addresses RFID in ...
Fashion
Dean A. Scarborough, president and chief executive officer of Avery Dennison Corporation, will host a special presentation and discussion during the RFID in Fashion 2008's Leadership Forum, an invitation-only event for senior-level executives from retail, apparel, footwear and accessories companies.
In addition to Scarborough, two other Avery Dennison executives, James Stafford, head...
Website:
http://www.apparelsearch.com
RFID BlueBerry iS UHF by TERTIUM Technology
BlueBerry iS UHF is an RFID key fob reader capable of reading an UHF RFID tag and transmit it via Bluetooth® to any device equipped with that interface. With the push of a single button, this easy-to-use device allows the reading and transmission of RFID tag data to a mobile device.
The device has a reading distance of 30 cm with tag far field and 2 cm with tag near field (depending on the used...
Website:
http://www.tertiumtechnology.com
rfid in healthcare Archives
Recent improvements in RFID have also led to a growing interest in the technology within healthcare. Research suggests its utilization in the sector is expected to reach $4.86 million by 2022 .
Research suggests the utilization of RFID technology in healthcare will reach $4.86 million by 2022. Click To Tweet
What is RFID technology?
RFID technology consists of an RFID tag, which is effectively a...
Website:
https://viehealthcare.com
Mifare Reader Module - SL025M - stronglink-rfid.com
Home > Products > RFID Modules > SL025M
MIFARE Reader Module SL025M
Being developed based on NXP's transponder IC, HF RFID Module SL025M is a MIFARE OEM reader/writer. It supports MIFARE Classic® 1K, MIFARE...
Date: 2017-07-13 06:08:05
Website:
http://www.stronglink-rfid.com
Related topics : mifare rfid reader module / hf rfid reader module / rfid reader mifare classic / rfid reader oem module / embedded rfid reader module
RFID System Hardware, Supplies, & Equipment - Big Sales ...
RFID Software: Inventory, Asset Tracking, Surveillance, Printing & More
Barcode Giant has a full range of RFID Tracking Software , RFID Printing Software , RFID Inventory Software , and RFID File Tracking Software to help manage the items for your business with the latest technology. Our RFID software is designed to collect data using passive UHF RFID technology. Check out our RFID Software...
Website:
barcodegiant.com
RFID UHF Antennas -- demonstration
This video provides a short introduction to UHF RFID...
Website:
youtube.com
Related topics : small uhf rfid antenna / uhf rfid reader antenna / uhf rfid antenna / small uhf rfid reader / uhf rfid reader module
RFID Solutions for Warehouse Management | RFID Systems
"RFID Inventory Tracking | Eskimo Cold Storage RFID Inventory Management IARW 2014
SLIDESHARE
How to Use RFID to Increase Profitability
VIDEO
RFID Solutions | What Is RFID? | Jamison RFID and Datex
What is RFID?
RFID or radio frequency identification is a system that transmits identity in the form of a unique serial number of a product wirelessly. RFID, a type of Auto-ID technology is used to reduce time and labor and improve real time data accuracy. Most commonly, an RFID tag consists of a microchip attached to a radio antenna mounted on a...
Website:
https://www.datexcorp.com
Related topics : radio frequency identification (rfid) asset tracking system / rfid active reader passive tag / rfid inventory management system / passive rfid tag system / active and passive rfid tags
GiS mbH - RFID, RFID Leser, RFID Reader, Transponder ...
What is a RFID-Tag ?
A RFID-tag is a microelectronic circuit with transmit- and receive-antenna, with a control-unit and a data- and energy-memory. These circuits exist in several types of housings, for example as stick-label, button, chip-card, stick, bracelet, screw or badge. The housing is hermetically sealed and are very robust and resistant against shock, ...
Date: 2016-01-27 14:37:06
Website:
http://www.gis-net.de
Alien Technology Trusted Performance™ for RFID
[message-ticker group="group1"]
The Hydra Vision
A large number of relatively simple readers with high connectivity and great performance that crushes the overall cost of the system and installation.
ALR-F800-X
A New Revolutionary Solution That Combines an Enterprise RFID Reader and Edge Service to Provide Multiple-Reader visualization and...
Website:
http://stage.alientechnology.com
RFId Gateway Hardware - BTG Tecnologie
RFId Gateway Hardware
RFId Gateway Hardware
Why we use RFId gateways: RFId gateways�provide�a comprehensive solution to your RFId needs. They combine the RFId reader with their antennas, creating a quick and easy way to read tags, regardless of application. Gateways can also be necessary when high levels of interference could affect RFId performance.�As always,�BTG is here to help...
Website:
http://www.btgtecnologie.com
Related topics : rfid gateway / gate rfid reader / technology solutions rfid reader / rfid gate antenna / gate rfid
Surgical Instrument Comprising a Detection Means - Tagil ...
The invention relates to a surgical instrument (1) comprising a detection means (10) for reacting to at least one external stress (30) emitted by a generator means (15) that generates the stress (30). The invention also relates to the method for producing such a surgical instrument (1). The invention likewise relates to the generator means (15). The invention further relates to a method for...
Website:
http://www.freepatentsonline.com