The Texas Instruments TI-99/4A (PHC004A) vintage home computer is a classic piece of computing history originating from the United States. This home computer, manufactured by Texas Instruments, is a vintage gem that harkens back to a time when personal computing was still a relatively new and burgeoning field. With its retro design and functionality, the TI-99/4A serves as a nostalgic reminder of the early days of home computing and continues to hold a special place in the hearts of vintage computing enthusiasts.Missing keys on the keyboard, including the spacebar - untested.