| 摘要 |
A rectangular personal digital assistant (PDA) includes a rectangular housing having a front side facing towards users and four corners, a computer circuit installed in the housing for providing data processing services, a socket installed in one of the four corners and electrically connected to the computer circuit, and a peripheral module having a case and an input/output peripheral circuit removably and electrically connected to the socket. When the peripheral module is installed in the socket, the case of the peripheral module coupled to the corner of the PDA housing will form an integrated corner of the PDA housing.
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