It was written...
     The first computer I ever used was an HP 200B,
TimeShare BASIC. 
2000B I guess you mean?
  The
 notable thing about the log-in accounts was that they were all of the
 pattern annn where a=alphabetic and n=numeric.  The "A-triple-zero"
 account, A000, was the Master Account, and files saved by that user were
 accessible as read-only for all users.  And, when user A000 saved a
 BASIC program named "HELLO," that program was run automatically at
 log-in for every user.  Our HELLO program was very cool... eventually.
 <Grin> 
That's all definitely from the HP2000 TSB OS.
     Any other letter, followed by three zeros, was a
Group Account, and
 files saved by that account were read-only for any other account
 starting with the same letter, i.e., other group members.  Regular users
 had an account that was not zero in the numeric part; ours was H455.
 That account structuring scheme was odd enough that if you remember it,
 you were almost certainly in the HP2000 realm... 
I don't believe you were using
2000B then, as I don't believe 2000B had the
group account feature. You've certainly ruled out 2000E by that statement.
Jay West