Computing Reference Libraries

Page 9 of about 89 Articles
2010-09-09 17:44:12

Computer hardware describes the physical components that make up a personal computer. Operating systems and many software applications can be installed on hardware in order to perform the operator's desired functions. Most personal computers consist of a chassis in a tower shape, a desktop, all of which contain hardware components. The main component inside the case of the computer is the...

Mainframe Computers
2010-09-09 17:33:23

Mainframe computers are powerful devices that are mainly used by big companies for critical applications and bulk data processing. The name comes from their substantial size and certain power requirements. It originally referred to the sizeable cabinets where the central processing unit and main memory were located; today, however, it is used to distinguish high-end commercial machines from...

2010-09-09 12:29:38

A cache is a computer part designed to improve performance by storing data in a way that leaves room for future data to be stored. Such data may include values that were stored elsewhere, making it quicker and easier to find. Without caches, the data must be taken from its original location, which takes significantly more time. The more requests the cache can take out, the better the overall...

2010-09-09 11:48:20

A bus is a subsystem that has the ability to transfer data from different computer components, whether in the same computer or two separate ones. Historically, the first computer buses were quite literally parallel electrical buses that had several connections. Today, however, the term bus can be used to describe any component of a computer that has a similar function or intent. A common...

2010-09-09 11:12:05

An accumulator is a register in a computer's central processing unit (CPU) that stores mathematical information, such as additions, subtractions, etc. For example, when adding a list of numbers, each number is entered into the accumulator and added together. Once all numbers have been inputted into the accumulator, they are stored on the computer in the register. Without an accumulator, each...

Hard Disk Drive
2010-09-08 11:52:07

A hard disk drive is a non-volatile storage device for digital data. It has rotating rigid platters on a motor-driven spindle that is held in a metal case. Read/write heads float on a cushion of air about the platters and encode data magnetically. Hard disk manufacturers refer to disk capacity in standard powers of 1000. Hard disk drives were invented in 1956 by IBM and have been the dominant...

Floppy Disk
2010-09-08 11:21:22

A floppy disk is a thin, flexible magnetic storage device that is stored in a square or rectangular plastic cover. They are read and written by a floppy disk drive in the computer. There are five major parts of a floppy disk. The read/write heads are on both sides and move together. The drive motor is a small spindle motor that spins in the center, while the stepper number moves at a certain...

Blue bream
2007-04-10 16:21:41

Abramis ballerus also known as Zope or Blue bream, feeds mostly on larger zooplankton. In Sweden it is seen in Lake Vänern, Hjälmaren Mälaren and adjoining waters, plus Helgeån waterbody. It can reach up to about 17.72 in (45 cm) in length, and 1.76 lb (0.8) kg. Photo by Jukka Halonen

2007-01-22 13:58:01

The fennec is a small fox found in the Sahara Desert of North Africa (excluding the coast) that has distinctive oversized ears. Description The fennec is the smallest canid, only weighing up to 3.3 lb (1.5 kg). The fox is 7.9 in (20 cm) tall at the shoulder, with a body length of up to 15.7 in (40 cm). The tail is an additional 9.8 in (25 cm) or so, and the ears can be 5.9 in (15 cm)...

Word of the Day
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.