Depends on what you mean by notes. 1. temporary short term memory aids ... ip address, doodles to help concentrate and picture in your head what someone is tal

Depends on what you mean by notes. 1. temporary short term memory aids ... ip address, doodles to help concentrate and picture in your head what someone is talking about, or to stay awake 2. facts, concepts and relations, piecing together knowledge 3. tasks, todo's 4. ... dunno, sure there are more