680

[EECS]  680(W, KW or MW) is one of standard numerical values for resistors (of tolerance class 5%). 680pF (picofarads) is one of standard numerical values for capacitors.

 

[Phone]  International telephone dialing code for Palau.

 

681

[Library]  ISBN-0-681 is the International Standard Book Number for books published by Longmeadow Press/Oceana/Chrysalis/Visible Ink/Hermes House/SevenOaks.

 

[Phone]  International telephone dialing code for Wallis and Futuna.

 

682

[Phone]  International telephone dialing code for Cook Islands.

 

[World]  The ISO country code for Saudi Arabia. (ISO-3166)

 

683

[Math.]  A prime number.

 

[Phone]  International telephone dialing code for Niue Island.

 

[Science]  1 lumen = 1/683 watts at the light wavelength 555 nm (nanometers), the wavelength usually referred to be the most sensitive to human eyes. 1 lux = 1 lumen per meter square.

 

684

[Library]  ISBN-0-684 is the International Standard Book Number for books published by the Free Press (of Simon & Schuster) or Charles Scribner’s Sons/Touchsotne. Also, ISBN-0-7432.

 

[Phone]  The telephone area code for American Samoa (within U.S./NANPA).

 

685

[Phone]  International telephone dialing code for Samoa.

 

686

[Phone]  International telephone dialing code for Kiribati, Gilbert Islands.

 

[World]  The ISO country code for Senegal. (ISO-3166)

 

687

[Phone]  International telephone dialing code for New Caledonia.

 

[Science]  A Martian year is approximately 687 Earth days.

 

688

[Library]  ISBN-0-688 is the International Standard Book Number for books published by William Morrow and Company, Inc.

 

[Math.]  688 = 8×86.

 

[Phone]  International telephone dialing code for Tuvalu, Ellice Islands.

 

689

[Phone]  International telephone dialing code for French Polynesia (Moorea and Tahiti).

 

680-689

[Library]  Numbers 600-699 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Applied Sciences and Technology (Medicine, Agriculture and Engineering…). Numbers 680-689 are for books in Application-Specific Manufacturing.