[dpark]

That was one of the most popular line ending formats. According to Wikipedia, the following non-MS-related all used CR\LF: DEC TOPS-10, RT-11, CP/M, MP/M, Atari TOS, Symbian OS, Palm OS. Meanwhile Mac OS used just CR, as did the Apple II, Commodore, Acorn BBC, and TRS-80. The only players that used LF were Unix (and derivatives), BeOS, Amiga, and RISC OS.

It just happens that we ended up in a world where basically everything is Unix or Windows, so Windows seems like the odd man out. But history tells a rather different story. The use of CRLF was enshrined in RFC561 (the original email RFC) in 1973, before Unix was popular.