NEC POWERMATE VP Manual page 213

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Use a timer or reminder software to remind you to take
breaks.
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To enhance blood circulation, alter your sitting posture
periodically and keep your hands and wrists warm.
For more information, see the Visual Display Terminal
standards ANSI/HFS 100-1988 developed by the Human
Factors Society and issued by the American National
Standard Institute (ANSI). Also see literature by experts in
the field of ergonomics and human factors.
Setting Up a Healthy Work Environment A-11