GIGO
Garbage in, garbage out
Example
If you're not sure about your input data, then remember the GIGO principle
Right. I'll double-check the imported data
GIGO definition by Slang.net
This page explains what the acronym "GIGO" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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GIGO is computing shorthand that describes how the quality of a program's output directly depends on the quality of its input. It is a principle meant to remind people that no matter how powerful or sophisticated a computer program may be, if the data entered into a system is flawed, incorrect, or poorly structured, the results produced by the system will also be flawed.
People often use GIGO online, especially in forums, to emphasize the responsibility of users to ensure that the information they feed into a program is correct. For example, if a company inputs incorrect sales figures into a financial analysis program, the resulting reports will be inaccurate.