real/fictitious person system
one's own flesh and blood / mask (esp. a noh or kyogen mask)
BTRON uses a network-type model that forms an arbitrary directed graph structure, called the real/false model, as a file management model, instead of a conventional tree structure with directories (folders).
As for functions provided to users, the real/false body model of BTRON (BTRON1 and BTRON3, whose implementations are widely used) is an easy hypertext environment.
BTRON - Wikipedia
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