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Draft:Command-based computer

From Wikipedia, the free encyclopedia

Command-based computer is an informal term used here to describe early personal computers whose primary user interaction was through typed commands or simple text-based input rather than modern graphical interfaces.[1]

In many early microcomputers, users worked directly with command interpreters or programming languages such as BASIC.[2]

Many of the first commercially available microcomputers were built in the mid-1970s and used simple text-based interfaces. For example, the Altair 8800 could be programmed via switches or connected to a terminal to accept typed commands on a serial device, while systems such as the Apple I, Apple II, and Commodore PET provided built-in BASIC interpreters.

Examples

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Sample programs

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The following examples show simple BASIC commands that were commonly used on many early microcomputers that booted into BASIC interpreters.

BASIC systems

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To print the string "Hello, World!" in BASIC:

PRINT "Hello, World!"

To compute 2 + 2:

PRINT 2 + 2

Sample programs could vary depending on each computer's built-in interpreter.

See also

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References

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  1. ^ Ceruzzi, Paul E. (2003). A History of Modern Computing. MIT Press.
  2. ^ Freiberger, Paul (2000). Fire in the Valley: The Making of the Personal Computer.