IDEA.

Idea is a thought of something that comes on your mind suddenly.

Usually you want to fix in memory the non-trivial ideas that you don't have on your mind before.

The ideas may come in two ways:

There is sense to write down or put into Informaizer the ideas you have immediately. Otherwise you're risking to forget your idea.

Example.
06.05.03 08:12 I can use this tool to fix the problem #4!!!