UNATCO Training Manual

 is a book appearing in Deus Ex. It is a handbook containing basic information about UNATCO, its duties and operations available to all operatives of the organization.

It is located in the training facility during the tutorial.

Transcript
UNATCO TRAINING MANUAL Section 3C: Multitools

''A "multitool" is not really a tool at all -- not in the usual sense of the word -- but a disposable electronic device that utilizes electromagnetic resonance detection and frequency modulation to dynamically alter the flow of current through almost any non-hardened circuitry. Skilled agents can use the multitool to manipulate code locks, cameras, autogun turrets, alarms, or other security elements.''

Note that multitools CANNOT be used for computer information extraction (see Section 5A: Hacking).