The 9825 was HP's first HPL (High-level Programming Language) computer. It replaced the 9820. The 9825 had a full QWERTY keyboard and three expansion slots at the rear of the machine. The 9825 also had a live keyboard which enabled the user to type while the computer was executing other functions. Other built-in features included a 16-character thermal printer and a 248K mini-cartridge tape drive.