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From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
Subject: Re: [TUHS] What was your "Aha, Unix!" moment?
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    > From: Warren Toomey <wkt@tuhs.org>

    > But wasn't "chdir" built into the PDP-7 Unix shell?

No.  See "The Evolution of the Unix Time-sharing System", in section "Process
control".

Also, the old 'cd' had different syntax than today's (since there was no notion
of a pathname in the earliest Unix); it took instead a list of directories (e.g.
"cd dd ken").

    Noel