(rare) plural of a, the name of the letter A.

Initialism of Advanced Encryption Standard.

(spectroscopy) Initialism of Auger electron spectroscopy. / (spectroscopy) Initialism of atomic emission spectroscopy. / (socialism) Initialism of actually existing socialism.

Initialism of American English. / (US, military) USPS military code of Armed Forces – Europe. / Armenian Era

Initialism of active euthanasia.

Variant of æ.

plural of -a

Money borrowed from someone else; debt.

(communication, programming) Initialism of OPC Alarms & Events (an OPC Specification for alarms and events.)

(astronomy) A star of spectral type A that shows emission lines in its spectrum