What IETM means and its different levels. IETM stands for Interactive Electronic Technical Manual and is a digital manual that contains technical information and cross-references. There are four levels of IETM, with Level 1 being just scanned images compiled together and Level 4 being a database-driven software. The article also explains that IETMs are mainly used in the defense system and are mandatory deliverables by the Indian defense. For More Visit: https://www.codeandpixels.net/features-of-ietm-software