Patent ID: 8688884

Claim:
An information processing system comprising: an information processing apparatus proper configured to include an optical communication connection portion establishing optical communication connection; a first functionality expansion apparatus configured to have an optical communication connection portion optically communicating with apparatus connected to the optical communication connection portion of said first functionality expansion apparatus, said first functionality expansion apparatus having a first processing function portion configured to process or store data for use by the information processing apparatus; a second functionality expansion apparatus configured to have an optical communication connection portion optically communicating with apparatus connected to the optical communication connection portion of said second functionality expansion apparatus, said second functionality expansion apparatus configured for a second processing function portion; and a receiving portion for physically receiving said first and second functionality expansion apparatuses; wherein said second functionality expansion apparatus optically communicates with said first functionality expansion apparatus when said first and second functionality expansion apparatuses are received by said receiving portion and are connected to each other through their respective optical communication connection portions, and said second functionality expansion apparatus communicates optically with said information processing apparatus proper when connected thereto through their respective optical communication connection portions.