A popular multi-user, multitasking operating system developed at Bell Labs in the early 1970s. Historically, it has been less popular in the personal computer market, but the emergence of Linux may revitalize it. A battery device primarily used as a backup power source for computers and computer networks to insure on-going operation in the event of a power failure. Sophisticated UPSs provide additional power conditioning and power monitoring features. Volatile Memory Computer memory that retains information only when receiving power.
Wands are older bar code reading technology and their functionality is limited.
They are inexpensive and are used where speed and performance are not crucial and the item to be scanned offers a smooth, accessible surface. Windows has been the operating system on nearly 90 percent of the world's desktop PCs since 1993. In 1995, the company released Windows 95, which for the first time fully integrated MS-DOS with Windows followed by Windows 98 and Windows 2000. The server-oriented version of Windows. It is more suited as a network server for multi-user systems and more complex than desktop versions of Windows.