Clock &Time Information
information and technical reference

Clocks

Old Clocks

Real Time Clocks

Computer Clocks

Atomic Clocks

Radio controlled Clocks

Time Stamps

Time Keeping

History of Time Keeping

Greenwich Mean Time

NIST Time Servers

Origins of Daylight Savings Time in the U.S.

New NIST Cesium Atomic Clock is World's Most Precise

Radio Controlled time clocks

GPS controlled time clocks

Time Standards

Time and Time Standards
    Local Time
    Universal Time
    Coordinated Universal Time (UTC)
    Greenwich Mean Time
NIST Time Servers

NIST Time Setting Format

More on the Leap Second

Origins of Daylight Savings Time in the U.S.

OATS and NASD regulations

PC Clocks

The Clocks Inside your PC
Hardware and Software Time Keeping Levels in a PC
Time Losses in System Clock on Windows 95-Based Computers in a PC
System Clock in Windows NT Can Lose About One Second per Hour
PC Real Time Clocks - Dependence on BIOS and Power
Computer BIOS and Windows NT Daylight Savings Time Settings
Applications Cause Time Loss in Windows
Clock on Taskbar and in Date/Time Tool Loses Time in Windows 95/98

What time is it?

Check your computer's time

Set your clock

Frequently Asked Questions

PC clock FAQ

 

Timekeeping and time standards FAQ

 

GPS time synchronization FAQ

 

ClockWatch FAQ

 

DocuClock FAQ

 

ClockCard FAQ

Clock Trivia

The World is Slowing Down

What is the Leap Second

Strange clocks of old

When did  Daylight Savings Time start in the U.S.

 

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