difference between 'server operating temp' and 'server storage temp'

We have a Dell PowerEdge 1800.  AOn the Dell website, these are the recommendations.  What is the difference between server operating temp and server storage temp?  Thanks.

Operating Temperature: 10º C to 35º C (50º F to 95º F)
Storage Temperature: -40º C to 65º C (-40º F to 149º F)
Operating Relative Humidity: 20% to 80% non-condensing
Storage Relative Humidity: 5% to 95% non-condensing (twmax=38C)
Maximum Humidity Gradient: 10% per hour, operational and non-operational conditions
Operating Vibration: 0.25G at 3Hz to 200Hz for 15 minutes
Storage Vibration: 0.5G at 3Hz to 200Hz for 15 minutes
Operating Shock: 1 shock pulse of 36G for up to 2.6ms
Storage Shock: 6 shock pulses of 71G for up to 2ms
Operating Altitude: -15m to 3,048m (-50 ft to 10,000 ft)
Storage Altitude: -16m to 10,668m (-50 ft to 35,000 ft)
Thank you very very much!
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Operating temperature is the acceptable temperature when the server is on and running...  The storage temperature is the acceptable temperatures at which you can store the device when it is not operating.  Operating or storing the server outside of these temperatures can cause damage to the device.

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texastwostepAuthor Commented:
What if it is left overnight in a room approx 80 degrees running?  Is that acceptable?  or is it safer to go lower.  It really feels warm in here.
If it is left in a room approx 80F overnight, it IS safe.  It is safe running in a room 80F 24 hours a day, 7 days a week, 365 days a year.  That is comfortably withing both operating AND storage temperatures.  You still have a 15F margin for saftey/error.  You can go home and sleep comfortably.
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