History, Geography, Cartography and Time Keeping

History
Geography
Cartography
Time Keeping

History:

Site:
Comments:
Vintage News
Not exactly what most of us think of as "history", but a lot of good stuff that's old or very old.



Geography:

Site:
Comments:
CIA World Factbook Maps
Wide range of maps kept up-to-date
Geospacial Solutions



Cartography:

Site:
Comments:
National Geospacial-Intelligence Agency



Time Keeping:

Site:
Comment:
Network Time Protocol
NTP software, Public server pool
Tycho (U.S. Naval Time Service Department)
Time standards