The Small Area Statistics (SAS) constitute the third type of CAS. The SAS consist of about 9,000 counts arranged in 86 tables. The tables are 'junior' versions of those in the LBS with fewer variable categories.
More information about the SAS is provided in CHCC CAS Unit 1: A Quick Introduction to the Census [Note: This link opens in a new window]
The equivalent data set to be produced from the 2001 Census will be termed the Census Area Statistics (CAS). These will contain fewer counts than the 1991 SAS, in simpler tables avoiding concatenation.