To tell the age of any horse Inspect the lower jaw of course; The six front teeth the tale will tell, And every doubt and fear dispel.

Two middle nippers you behold Before the colt is two weeks old; Before eight weeks two more will come Eight months: the corners cut the gum.

At two the middle “Nippers” drop: At three the second pair can’t stop; When four years old the third pair goes, At five a full new set he shows.

The deep black spots will pass from view At six years from the middle two; The second pair at seven years; At eight the spot each corner clears.

From the middle “Nippers” upper jaw At nine the black spots will withdraw. The second pair at ten are bright; Eleven finds the corners light.

As time goes on the horsemen know The oval teeth three-sided grow; Then longer get - project before - Till twenty, when they know no more."

doom cheat codes:
IDDQD, god mode
IDKFA, ammo
IDSPISPOPD, no clip i think

I might as well go first. A friend read this to me once over the phone in 1997 or thereabouts, and it stuck:
Cracked
09B9085A

…Sadly, winzip stopped accepting that as a valid reg key some time in the 2000’s.

The 7 names of the antique greek Muses:

Calliope
Clio
Polyhymnia
Euterpe
Terpsichore
Erato
Melpomene
Thalia
Urania

Loading a program from disk on the Commodore 64

LOAD"*",8,1

I haven’t loaded a game on that system since I was probably 10 or so, but I’ll never forget the command.

I memorized it as L-O-A-D shift-2 star shift-2 comma eight comma one.

down, right, left, right, square, circle, square, triangle, circle, square, right, left

The level select code for Abe’s Oddysee on the PSX. The last time I actually used this code was probably some time around 2002, maybe even earlier.

Iddqd

Rosebud

L1 R2 R1 R2 left down right up left down right up

Morse code. Did a science project back in middle school with wires, buzzers and tappers on a board. Then I taught it to my boy scout troop for a badge. Then lost some of it before joining the army in communications (as well as a ton of other outdated means of communication) and then in Iraq, me and another commo guy wired up our rooms for it so we could talk shit about our leadership even if they were in the room. Anyways, after working with it that many times over a stretched out time frame, I’ll never forget that. Or the phonetic alphabet.

The model codes to 2nd and 3rd Gen Intel I series chips. Made figuring out what processors were in used laptops quite easy back in the day. Now I have to Google them (doesn’t help that their naming scheme is more confusing).

Morrowind on the original Xbox came with cheat codes. Put the cursor over the health, magicka, or fatigue bar, enter the codes with the black and white buttons then hold A until the bar fills. If you close the menu before you let go of A, it will continue to refill constantly until you open your menu again.

Health: B, W, B, B, B, A

Magicka: B, W, W, B, W, A

Fatigue: B, B, W, W, B, A

You could actually use the magicka code for all 3, but I liked that there were 3 different codes.

3.14159265359 (ok the last 9 is actually an 8 but it’s followed by a 9 so I round up).

Not exactly obsolete, but there’s no reason for anyone to memorize that many digits of Pi except for trivia. Number of times it has come up in trivia: 0.

Former NBA players Jarrett Jack and Chris Duhon are cousins.

C9 means RET

The idqdd for the game ChexQuest (which ran on that engine) was “charlesjacobi”. I assume this was a dev’s name.