To be fair, I'd rather type BEGIN instead of <<? Or whatever the trigraph is supposed to be. We tend to forget that a lot of computers didn't have the keys to type "mathematical" symbols.

EBCDIC was already dead in the 1980s. Nobody ever used the trigraphs except for one company that hung on for years until even the C++ community decided enough was enough and dumped them.

Besides, what people wrote was:

    #define BEGIN {

    #define BEGIN <<?