The collaborative human interpreter (CHI) is a proposed software interface for human-based computation (first proposed as a programming language on the blog Google Blogoscoped, but implementable via an API in virtually any programming language) specially designed for collecting and making use of human intelligence in a computer program.
For example, it is currently difficult for a computer to differentiate between images of men, women and non-humans.
A programmer using CHI could write a code fragment along these lines: Code for the function checkGender(Photo p) can currently only approximate a result, but the task can easily be solved by a person.
If the person (task processor) inputs value MALE, you'll get the value in your variable result, in your program.
On November 6, 2005, Amazon.com launched CHI as its business platform in the Amazon Mechanical Turk.