Red Hat Society Pajamas

red hat
Red Hat, Inc. is an S&P 500 company in the free and open source software sector, and a major Linux distribution vendor. Founded in 1993, Red Hat has its corporate headquarters in Raleigh, North Carolina with satellite offices worldwide.
A cardinal's hat, esp. as the symbol of a cardinal's office
A galero (pl. galeri; L. galerum, pl. galera) in the Roman Catholic Church is a large, broad-brimmed tasseled hat worn by clergy. Over the centuries the galero was eventually limited in use to individual cardinals as a crown symbolizing the title of Prince of the Church.
A computer 'operating system' based on Linux and sometimes used by Spokes for the Archives Hub's Cheshire 3 software.

society
A specified section of such a community
club: a formal association of people with similar interests; "he joined a golf club"; "they formed a small lunch society"; "men from the fraternal order will staff the soup kitchen today"
company: the state of being with someone; "he missed their company"; "he enjoyed the society of his friends"
The aggregate of people living together in a more or less ordered community
The community of people living in a particular country or region and having shared customs, laws, and organizations
an extended social group having a distinctive cultural and economic organization

pajamas
(pajama) a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
A suit of loose pants and jacket or shirt for sleeping in
Pajamas, also spelled pyjamas (see also spelling differences) can refer to several related types of clothing. The original paijama are loose, lightweight trousers fitted with drawstring waistbands and worn in South and West Asia by both sexes.
A pair of loose pants tied by a drawstring around the waist, worn by both sexes in some Asian countries
(pajama) (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers