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Ice-Cube Markers for in-room use
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The first models of telephone sistems.
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Color TV in guestroom
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Air-conditioning
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Electronic air cleaner
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Mechanic coded-plastic room key card
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Satelite TV
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Satelite on-demand movie system/voice Mail Systems
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Electronic door-keys
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Electronic in room safe/wake-up Systems
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Interface between TV systems and PMS
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Remote check-in/out systems
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High-speed Internet access (wired)
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High-speed Internet access (wireless)
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Voice-over IP
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HDTV