My brand new computer !
- does not fit in my backpack (bad !)
- runs Unix (good !)
- OS does not have AI extension that I don't want (good !)
- 32 Kb of main memory, I'll need to optimize hashtag#geogram a bit (good !)

@BrunoLevy01
You have a wide range of OSs to run on that. According to Wikipedia, various models of the PDP 11 could run:

BATCH-11/DOS-11, DSM-11, IAS, P/OS, RSTS/E, RSX-11, RT-11, Ultrix-11, Seventh Edition Unix, SVR1, 2BSD

My second PC was a PDT 11-78. Small box, two 8" floppy drives, VT-101 Monitor, with an LA-35 "DECWriter III" 7-pin printer. (I'm trusting my very old memory for those model numbers)