This is a simple integer vector, whose four elements are:

⎕AI[1]	user identification.1Under Windows, this is the aplnid (network ID from configuration dialog box). Under UNIX and Linux this is the effective UID of the account whereas ⎕AN returns the real name.
⎕AI[2]	compute time for the APL session in milliseconds.
⎕AI[3]	connect time for the APL session in milliseconds.
⎕AI[4]	keying time for the APL session in milliseconds.

Elements beyond 4 are not defined but reserved.

Example

     ⎕AI
52 7396 2924216 2814831