This is based off @GaryShainberg and his post about his WAP. I thought this would be a bit of fun. I will have to have a look to work out what mine would be.
I bet @MichelRueger has some contributions to make to this thread, based on his entry from a community challenge a couple months back: https://community.meraki.com/t5/Community-Announcements/Share-your-nostalgic-networking-stories-Win-...
I have an APC Smart-UPS 1500 RM UPS that is still on the original batteries from April 2, 2005. It's been running steady the last 13 years. Now watch the batteries go on me. I did have an hour long power outage last week and the UPS lasted about 32 minutes.
I moved some stuff off of it so now it's forecasting 46 minutes of runtime. It protects my ISP's modem, MX64, MS-220, 3 PoE access points (1 MR18 and 2 TP-Link ones), a Cisco VoIP box and a little ALIX computer that controls the UPS and gives me SSH access from outside.
If it's stuff that I actually use, these two are used as glorified calculators as I wrote a few things for them in the 80s to assist when I was doing a lot of assembly language coding.
As I wrote a new custom tape routine for the 35th anniversary version of a friends 'hit game' they were once again pulled into service (happens every time I do a bit of retro coding.)
If you don't know what a tape loader is then ask an elderly relative about when it took games 8 plus minutes to load from tape.
Just yesterday we signed off on a purchase to move off our multiple ERP systems onto Dynamics.
But until we get that setup, a few hundred people are still using ManMan which is running on an HP3000 that has been in use in our offices since 1978.
Still going strong.