It was definitely notepad to edit some obscure .ini files on some pc game, or reading a Readme on a cracked/pirated game. On windows that would be the obvious case.

Downloading something over limewire or torrent and seeing a readme file for the first time is a pretty strong memory.

My first IDE was visual studio writing Visual Basic, I quickly binned that for netbeans and Java and then I think ended up using Eclipse.

Today I’m a casual evil mode emacs user mostly for magit and org-mode. also working in VScode for web languages.