$ whois perl

Perl

first released in 1987 · by Larry Wall

$ guessprog --inspect perl

year: 1987
paradigm: multi paradigm
family: c like
memory: reference counting
binding: dynamic
safety: weak

PERL(7)

AUTHORS: Larry Wall
HISTORY: Larry Wall, a linguist turned programmer, released Perl in December 1987 while working at Unisys. He wanted a Unix scripting language that made text and report processing easier than juggling sed, awk and shell scripts. He first called it "Pearl", but dropped the "a" on discovering an existing language named PEARL. Perl's motto, "There's more than one way to do it", reflects Wall's view of programming languages as something closer to natural languages.
USAGE: Past its peak, when it was the glue of the early web and CGI scripting. Perl 5 is still maintained and used for system administration, text processing, bioinformatics and in many long-lived legacy codebases.
SEE ALSO: Perl on Wikipedia ↗

$ cat wordcount.pl

#!/usr/bin/perl
use strict;
use warnings;

# Count word frequencies from STDIN
my %count;
while (my $line = <STDIN>) {
    $count{lc $1}++ while $line =~ /(\w+)/g;
}

for my $word (sort { $count{$b} <=> $count{$a} } keys %count) {
    printf "%-15s %d\n", $word, $count{$word};
}