IBM ThinkPad 310E User Manual page 183

Features and Specifications
D-2
IBM ThinkPad 310E/310ED: User's Guide
Keyboard
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85-key, 86-key, or 89-key
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TrackPoint III
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Fn key functions
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Embedded numeric keypad
Audio
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Compatible with Sound Blaster Pro
External interface
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DC-in jack for AC Adapter
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Serial connector (EIA-RS232D)
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Parallel connector (Centronics)
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External input-device connector
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External monitor connector
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External diskette drive connector
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Audio line-in jack
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Audio line-out/headphone jack
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Microphone jack
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Two PCMCIA slots (accept two Type I or Type II PC Cards, or
one Type III PC Card)