Metric and Related-
Standards Philately

Below is an index to checklists of postal items in various metric or related-standards categories. Each page features postal items such as stamps, souvenir sheets, postal stationery, postmarks, cancels, meters, and also cinderellas and cachets from covers when appropriate, as well as numismatic items (banknotes and coins). This is a work in progress, and completeness is the goal. If readers know of additional information or images, please contact the author using the e-mail address at the bottom of this page. See also the author's Websites featuring Un-Manned Satellite Philately and Weather and Climate Philately.

Metric and related-standards categories
	Metric system (The International System of Units (SI))
	World Standards Day (annually: 14 October)
	ISO and related standards
	SI-metric system unit names (the scientists behind the named metric units)
	Metric measurements (as seen on postal items)
	Postcodes of the world (Zip Code in the U.S.)
	Decimal money conversion (from non-decimal currency systems)
	Right-hand/left-hand driving customs (mostly the change from Left to Right)
	Standard time and time zones (and Gregorian Calendar)

Future metric or related-standards categories:

(The pages below will be available in the future.)

(Standard) traffic signs

Supporting information:

Published Philatelic Articles by the Author (including PDFs)
Biographical Sketch for the Author

Links to similar philatelic information elsewhere on the Web:

(The links below lead to information sources that are maintained by others. They are not part of this Website.)

Links to supporting information elsewhere on the Web: