A look at second-user computer equipment.

Let's dispense with myths first. I'm NOT talking about sort of second-hand computers you get from some high street junk shops, or sort you can buy from free ads newspapers. These are types that get used computers a bad reputation since there are many dodgy deals to be had!

I'm talking about a different breed altogether, sort of used computers you'd be proud to own and feel safe buying because they have proper and lengthy warranties on each and every one of them and have been extensively tested and approved.

The criterion is quite strict. Sure, there are any number of companies out there who offer used computers at low prices. Very few offer 12-month warranties however and many of them disappear just as quickly as they arrived leaving you with a problem. All computers, no matter which category they fit in, or what you call them, should be high quality, guaranteed, fully working computers from a reputable supplier.

So, let's put all computers into two categories, I'm going to call them 'used' and 'unused' computers.

1. Used Computers

Second-hand, second user and used computers are what you would expect in that they have had a previous owner. Many of computers have been returned to company from which they were bought in first place. This is ideal as company has appropriate expertise and spares already in place to correct any faults they find.

There are a number of reasons why computers are returned:

- businesses, colleges, individuals etc upgrade their computer equipment for latest model

- equipment was leased over a set period and lease expires (so equipment is returned)

- computer gets a fault that can't be fixed quickly so it is swapped permanently out for a new one

- customer changes their mind just after purchasing

RFID (pronounced as separate letters) short for radio frequency identification. It is a technology, which uniquely identifies objects automatically using wireless radio communications.

Radio Frequency Identification (RFID) is a technique of distantly piling and recovering data by means of devices known as RFID tags. An RFID tag is a little object, like a sticky label, that can be integrated into a product. RFID tags hold antennas to facilitate them to accept and react to radio-frequency inquiries from an RFID transceiver.

What is RFID tags? What are different RFID tags

RFID tags are of two types: active RFID and passive RFID. Passive RFID tags don’t have their own power supply. The little electrical current stimulated in antenna by inward radio frequency scan gives adequate power for tag to send a rejoinder. Because of power and cost factors, rejoinder of a passive RFID tag is essentially concise. It is normally just an ID number (GUID). Shortage of its own power supply crafts device very small. Commercially accessible products exist that can be implanted beneath skin. The least such devices commercially accessible measured 0.4 mm × 0.4 mm, and thinner than a sheet of paper. Such devices are virtually undetectable. Passive tags have practical read ranges that differ from about 10 mm up to about 5 meters. Passive tags are cheap to manufacture.

Active RFID tags, ought to have a power source, and may have longer ranges and larger memories than passive tags, as well as capability to accumulate additional information sent by transceiver. The smallest active tags are about size of a coin. Many active tags have convenient ranges of tens of meters, and a battery life up to several years. While cost factors of passive tags over active tags are noteworthy, other factors including accuracy and dependability make use of active tags very common today.

A number of nations have anticipated embedding RFID devices in new passports to ease proficient machine reading of biometric data. The RFID-enabled passport distinctively identifies its holder; in proposal currently under thought, RFID tag will also comprise a range of other personal information (More info http://www.bigsquid.org)

BIG Squid RFID is not merely integrating various RFID middleware (tags and readers) with our own products, but we have formed partnerships with other leading companies that enable us to provide supply chain solutions for various clients. BIGSquid RFID provides solutions to various industries like pharmaceutical, manufacturing, textile etc., across globe.

BIGSquid RFID is similar to bar code technology by automatically collecting information about a product or transaction quickly, easily and without human error. Lets understand some common differences between RFID and Bar Code.

BIGSquid RFID and Bar code are both identification technologies that hold data that is accessed by some type of reader. In actuality, they complement each other very well and can be used effectively side by side in many applications. Bar code is an optical technology and RFID is a radio technology. However, unlike barcode technology, it provides a contact less data link, without need for line of sight—for example articles inside a cardboard box—or concerns about harsh or dirty environments that restrict use of bar codes. Just like bar code, RFID tags are available with different memory sizes and encoding options. The ways these technologies exchange data account for most of differences between RFID and bar code and help determine where each identification technology is best put to use. (More info http://www.bigsquid.org )