Clive, 2nd ed. User's manual. Section 2 
SYNOPSYS

import "clive/u"

var Uid = "none" ...

DESCRIPTION

users

VARIABLES

var (
	Uid  = "none"
	Sys  = "sargazos"
	Home = "/tmp"
	Tmp  = "/tmp"
)
    Variables initialized at init time with the user, system, home directory and
    temporary directory names.

User's manual, 2nd ed. Section 2