History Vocabulary

Vocabulary Crossword

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floppy disk
hard drive
slide rule
vacuum tube

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3. An extremely fast computer that can perform hundreds of millions of instructions per second
6. A small, portable computer disk which can be used for storing documents and other computer files
7. Read Only Memory; Memory that can only be read from and not written to.
8. Personal Computer; A small, single-user computer based on a microprocessor.
9. a large capacity storage device made of multiple disks housed in a rigid case.
12. A manual device used for calculation that consists in its simple form of a ruler and a movable middle piece which are graduated with similar logarithmic scales
13. Random Access Memory; A temporary storage area where your computer can read and write file and application information
15. Binary Digit; a single digital piece of information; represented by 1's and 0's
16. Central Processing Unit; The heart of the computer, this is the component that actually executes instructions.
17. A glass tube from which all gas has been removed, creating a vacuum. Contained electrodes for controlling electron flow and were commonly used in early computers as a switch or an amplifier.


1. Enables a computer to store, at least temporarily, data and programs.
2. A small, hand held device used to move the cursor and select items
4. Universal Automatic Computer; A trademark of Unisys corporation; it was released in 1951 and 1952. Contains thousands of vacuum tubes that utilize punch cards and switches
5. A machine for writing in characters similar to those produced by printer's type by means of keyboard-operated types striking a ribbon to transfer ink or carbon impressions onto the paper
10. Acronym for Disk Operating System - used in IBM PC's.
11. Electronic Numerical Integrator And Calculator; began construction in 1943 and completed in 1946. Occupied about 1,800 square feet and used about 18,000 vacuum tubes, weighing almost 50 tons. Created to help with the war efforts against German forces.
14. A manual aid to calculating that consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame
15. 8 bits



by: Casey Jo Burrus
Last Updated:
December 28, 2013
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