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Level 23

Significance of Information Technology & the Histo


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abacus
An instrument used to perform calculations by sliding rings or beads along rods inside a frame.
Binary number system
a numbering system that uses only 1's and 0's
Computer
A programmable machine designed to carry out a sequence of arithmetic or logical operations
computer cluster
A group of computers working together to share resources.
decimal number system
A system with 10 numeric values, 0 through 9.
digit
A single character in a number system.
digital
An electronic signal (electrical pulse) used to transmit information in the form of binary digits.
form factor
The size and shape of a computer or device.
integrated circuit
A group of tiny transistors and electric wires built on a silicon wafer, or chip.
mainframe computer
A large, multi-user computer commonly used in large businesses and government agencies; more powerful than a minicomputer.
microcomputer
a computer that fits on a desktop and uses a microprocessor
minicomputer
A midsize, multi-user computer; more powerful than a workstation or personal computer but less powerful than a mainframe computer.
notebook/laptop computer
A small, lightweight, portable microcomputer with an attached flat screen.
personal computer
A computer designed to be used by one person at a time; the acronym PC is sometimes used to refer to IBM PCs and "compatibles" to distinguish them from Apple computers.
Punch Cards
Card with holes to represent data
SmartPhone
a device that combines the functionality of a cell phone, a PMP, and a PDA into one unit.
Supercomputer
Fastest, largest, and most expensive of the four classes of computers currently being manufactured
tally system
A system that uses marks or sticks for counting.
terminal
A device or computer connected to a multi-user computer, such as a minicomputer or a mainframe computer.
workstation
A single-user computer more powerful than a microcomputer; commonly used by engineers, scientists, and graphic artists.