Arguably, there is pre-Internet and post-Internet programming. Perl is a quintessential example for the Internet era of programming. It was developed via USEN

Arguably, there is pre-Internet and post-Internet programming. Perl is a quintessential example for the Internet era of programming. It was developed via USENET and email and FTP, with a global base of open source coders to drawn on. Got a question? Ask the mailing list. CPAN, Perl's automatic module system, dates to the early 90s. This is very different from programming alone on a micro, or on a mini or mainframe in an office environment. Much more like how we still do it today.