Why are C names shortened?
Why there is a function called strcat and not a function called stringConcatenation, or stringConcat or string_concat or something like that? Why there is a clrscr function and not clearScreen or clear_screen?

Does it have something to do with source code size in past days, where every byte was worth gold on overly-sized floopy disks? Or is this fueled by programmers' inherent laziness? Is it a convention?
Why are C names shortened?
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Why there is a function called strcat and not a function called stringConcatenation, or stringConcat or string_concat or something like that? Why there is a clrscr function and not clearScreen or clear_screen?

Does it have something to do with source code size in past days, where every byte was worth gold on overly-sized floopy disks? Or is this fueled by programmers' inherent laziness? Is it a convention?