AiM 3.0
AiM 3.0 was released on September 14 2003. Version 3.0 is direct development of version 2.0 with important new features. With this release the acronym AIM has been subtly changed to "Assessment in Mathematics": AiM.
AIM 2.x
These versions of AIM, also known as AIM-TtH, started with a major rewrite by Neil Strickland of the University of Sheffield. This version used a combination of LaTeX and Maple, giving better display of mathematics. The staff interface was also substantially improved. A large number of custom procedures were written for marking specific problems, such as integration questions. Details may be found in Neil's article Alice Interactive Mathematics, MSOR Connections 2 (2002) 27.
AIM 1.x
AIM stands for ALICE interactive mathematics. ALICE itself is an acronym for Active Learning in a Computer Environment. The original version of the system, written by Norbert Van den Bergh and Theodore Kolokolnikov at the University of Gent in Belgium. This used a combination of Maple and HTML, with the mathematics being displayed as Maple pritty print. More about the original version of AIM may be found in the article Saliha Klai, Theodore Kolokolnikov, and Norbert Van den Bergh: Using Maple and the Web to Grade Mathematics Tests, [PS format - 300K] or [PDF format - 3.5megs], published in the proceedings of the IWALT2000 conference.