There are about 2000 active Unix accounts. The SLAC Unix environment is the same independent of workstation.
Workstations are largely dataless.
There are about 400 end-user workstations plus about 170 NCDs that SCS supports. Users typically do not have root access, access to selected facilities can be enabled by sudo. Machines are updated nightly and continuously monitored. They limit the number of OS' supported, the main ones are Solaris and AIX with a plan to add Linux. SunOS is being phased out, NeXT is just about defunct.