If you're the administrator of anything larger than a NAT-based firewall, you've seen the need for using Columbia University's Kermit program. This program's sole purpose in life is to allow the user to talk to a piece of hardware, usually through the serial port. Now 22 years old, it even predates most of the Internet. While each OS may have its own program which "talks serial", Kermit has become somewhat ubiquitous in that it runs on just about every well-known OS. This is a "must-have" in any admin's toolkit.