The TI-99/4A was the first computer I owned as a teenager. I had used TRS-80s and Apple ][ at school. I eventually bought the expansion box and a couple of accessory cards (floppy disk drive, memory and RS232). It all went in the e-waste dumpster about 20 years ago during a move.
[1] https://exercism.org/profiles/mikestaas/solutions
[2] https://github.com/mikestaas/wasmfizzbuzz/blob/main/fizzbuzz...
[3] https://github.com/mikestaas/walox/tree/main/src