One of the central and more important innovations of the calculator was its adoption of the 10-key number pad; at that time other calculators were using a "full keypad", which meant that each place in the number (1s, 10s, 100s, etc ... ) had nine keys.
Salah satu inovasi utama kalkulator adalah adopsi dari tombol angka 10-key, pada waktu itu kalkulator lain menggunakan "tombol penuh", yang berarti bahwa setiap tempat di nomor (1s, 10s, 100s, dll. .) memiliki sembilan kunci.