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Draft:Command-based computer

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

Sample programs

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

BASIC systems

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

References

  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.

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