Brown corpus: Corpus of American English
The Brown corpus (full name Brown University Standard Corpus of Present-Day American English) was the first text corpus of American English. The original corpus was published in 1963-1964 by W. Nelson Francis and Henry Kučera at Department of Linguistics, Brown University Providence, Rhode Island, USA.
The corpus consists of 1 million words (500 samples of 2000+ words each) of running text of edited English prose printed in the United States during the year 1961 and it was revised and amplified in 1979 (see more at http://www.hit.uib.no/icame/brown/bcm.html)
Brown family corpus
This is an extended corpus of the Brown corpus which includes also the Lancaster-Oslo/Bergen Corpus (LOB), Brown’s British English counterpart, as well as Frown and FLOB, the 1990s equivalents of Brown and LOB. The corpus consists of 6 million words in American and British English.
The Brown corpus is PoS tagged with the Penn TreeBank tagset. The Brown family corpus has POS tags from the CLAWS tagset version 7.