These were card readers for new systems in the HITAC 8000 Series. They were developed as card readers for connecting with the HITAC-8350 and 8450 systems, and could read cards at a speed greater than that of the previous H-8233/38 card readers. (The H-8288 in particular had a speed of 1,600 cards/minute.)
The H-8287/88 could also be equipped with a column binary reading mechanism (for reading single cards punched with the data of two cards), and the H-8287 could be equipped with a mark card reader.
Cost performance of the unit was improved while providing compatibility with the previous H-8233/38 models.