History of the question mark

[hsiangch_ong]

In True Basic. The exclamation point begins remark. Not apostrophe.

I got this from a book: Radio Shack TRS-80 Model I allowed abbreviation of keywords. But also had to use period. Like "P." for "PRINT". "I." for "INPUT". "GOS." for "GOSUB" because "G." already taken for "GOTO".