Celebrate Pi Day

#wtworldcat #piday #pi

In recognition of Pi Day, which is celebrated around the world each year on March 14, here's a list of 8 items in WorldCat whose OCLC Control Numbers (at the end of the URLs below) align with pi. Since OCLC Control Numbers are randomly assigned, assembling this list of OCLC Control "pi" Numbers resulted in a random selection of publications that we hope you'll enjoy.

This year's Pi Day is extra special because the date and time 3.14.15 at 9:26:53 corresponds to the first 10 digits of pi (π = 3.141592653)—a unique occurrence that happens only once per century, making it a once-in-a-lifetime event for most! Happy Pi Day!

Illegitimacy and Adoption in Maine; Report of a Study Made for the Maine Committee on Children and Youth

State Department and Diplomatic Nominations: Hearing, Eighty-ninth Congress, First Session, on the Nominations of Thomas C. Mann as Under Secretary for Economic Affairs, [and others] March 2, 1965

Evaluation of Convertible Securities

Entropy and Generators in Ergodic Theory

Cry into the Night; a Volume of Poetry

Gandhi's Rise to Power, Indian Politics 1915-1922


Thurgood Marshall: a Dedicated Career

Uebersichts-Plan der Gemarkung Gross-Schönach: gezeichnet auf dem Großherzogl. Katasterbureau 1868

OCLC Control Numbers 314159265 and 3141592653 have not yet been assigned. Can't wait for Pi Day 2016 to see what they'll be!


Want more pi?

No problem! Libraries around the world hold tons of information and stories related to pi. Here are just a few suggestions to get you started:


This list was generated using WorldCat, the world's largest and most comprehensive catalog of library resources from around the world, with more than 314 million bibliographic records that represent more than 2 billion items held by participating libraries, including books, movies, music, e-books, licensed databases, online periodicals, digital collections and more. Because of its scale, WorldCat can be used to represent a large part of the scholarly and cultural record.

When a WorldCat record is created, it is automatically, sequentially assigned an OCLC Control Number, which enables successful implementation and use of many OCLC products and services.  

At OCLC Research, we're exploring records and mining WorldCat data to highlight interesting and different views of the world's library collections each month. Be sure to check out our "What in the WorldCat?" page often to see what we come up with next.