CP/M Operating system, 8 bit, 8080/85 (Intel) and Z80 (Zilog), max 64 kB memory ROM and RAM and floppy disk.

There was a trick to double the floppy disk capacity, by making a hole in the side of the disk and put it upside down in the floppy drive.

RS232 interface, always the wrong cable, the plugs (9-pins, 25 pins, female, male) and crossed or not. USB is already on its way (mini, micro, USB-C, etc.).

Items used:
Osborne 1 Computer 3D Model by asiry
Kora Original Figure With Hair and Outfit for G8F by Vyusur
Dream Home Childrens Furniture by Daz Originals
Z Retro Vibes Props and Poses by Zeddicuss
Own pose