RCSS meaning in Regional ?

Real Canadian Superstore is a chain of supermarkets owned by Canadian food retailing giant Loblaw Companies. Its name is often shortened to Superstore, or, less commonly, RCSS.

Originating in Western Canada in the late 1970s/early 1980s, the banner expanded into Ontario in the early 2000s as Loblaw attempts to fend off competition from department stores including U.S.-based Walmart.

Loblaw has tested alternative banners at some locations in Ontario, with some labelled as "Loblaw Superstore", and a few others as simply "Superstore"; for a time this was reflected in the chain's marketing which used a separate logo to advertise all of these banners. The company has since reverted to marketing the entire chain as Real Canadian Superstore, although some locations might retain other signage.