What is Interactive Electronic Technical Manual (IETM) and How Does it Work? IETM is a Software/ Web Application Having Database​​ As the name suggests, it's interactive and used in electronic devices i.e. IETM stands for Interactive Electronic Technical Manual Services which are classified as Level 1, Level 2, Level 3, Level 4 and Level 5. IETM is the replacement of paper work which is equivalent for a paper- based presentation.