I can use assembler and BASIC programming. This is a SHARP PC-G850 pocket computer. I checked the battery and it works, and it powers on. The buttons also seem to work as far as I can tell. The display is also good. Please understand that this has aged over time before purchasing. Please judge the appearance from the photos. It is sold as is. *I have cleaned it within a range that doesn't cause any problems. I've left the stickers on as they might get damaged. - Model: PC-G850 - Brand: SHARP - Function: Pocket Computer - Language: C Language - Display Mode: RUN MODE Thank you for viewing. #SHARP #PocketComputer #PocketCom