GIGO

Technology & Computing abbreviation · Computer

GIGO
Stands forGarbage in, garbage out
CategoriesTechnology & Computing

GIGO stands for Garbage in, garbage out, a computer abbreviation.

Principle that a computer's output can be no better than the data and instructions it receives: flawed input produces flawed results, however sophisticated the processing. It is cited in data analysis, forecasting, statistics and machine learning.

Example: The forecast missed because half the sales data was duplicated; classic GIGO.

Usage notes

The phrase dates to at least the late 1950s and is often credited to IBM instructor George Fuechsel. Pronounced "GUY-go" or "GEE-go". A cynical variant, "garbage in, gospel out", criticizes people who trust computer output uncritically simply because a machine produced it.

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