Every index card describes either one module, or two modules with an operation. The title hints at Forget Us Not (commonly abbreviated as F.U.N.). Take each module's 3 digit code, and if there is an operation, perform it.
|Baseball position + obfuscated jacket decorations||Third Base + Complicated Buttons||229|
|Ritchey C260 84D||Superlogic||112|
|Kevin from battle royale game||The Cube||821|
|Arrays of pixels - First game in Sega franchise||Bitmaps - Sonic the Hedgehog||105|
|Dodie Smith novel + advanced cables||101 Dalmatians + Complicated Wires||103|
|Despicable Me villians - Ratchet blocks||Vectors - Lombax Cubes||112|
|That light toggler + a joke in a manual||The Switch + Flavor Text||551|
|Boolean devices||Logic Gates||111|
|Piping system + line segment virtues||Plumbing + Chord Qualities||444|
|Medical radiation - visually impaired set of corridors||X-Ray - Blind Maze||214|
To extract, organize the numbers so that there are 3 digits in each row, in order. Then read down the left column, down the middle, and then down the right one. This is clued at by the arrangement of the cards. Doing so gives us a message in A1Z26, without the spaces. The numbers at the bottom show how to divide digits.
2 18 15 11 5 14 2 21 20 20 15 14 19 2 15 13 2 1 14 4
This spells out BROKEN BUTTONS BOMB AND, the answer to which is: