| ** Mid-year:** The PDP-7 version supports two concurrent users, one on a teleprinter and the other on the Graphics-2 device. The filesystem has the "dd" directory, a "system" directory for binaries and per-user directories, but no concept of pathnames, "." or ".." [ [[https://github.com/DoctorWkt/pdp7-unix|extant source code]] ]. Utilities include as, bi (B interpreter), cat, check (filesystem checker), chmod, chown, chrm (remove files), cp, db (debugger), dsw (delete from switches), ed, ln, mv, sh, stat (ls-like output on one file). | ** Mid-year:** The PDP-7 version supports two concurrent users, one on a teleprinter and the other on the Graphics-2 device. The filesystem has the "dd" directory, a "system" directory for binaries and per-user directories, but no concept of pathnames, "." or ".." [ [[https://github.com/DoctorWkt/pdp7-unix|extant source code]] ]. Utilities include as, bi (B interpreter), cat, check (filesystem checker), chmod, chown, chrm (remove files), cp, db (debugger), dsw (delete from switches), ed, ln, mv, sh, stat (ls-like output on one file). |
| **Mid-year:** The PDP-11/20 is ordered, but it arrives with no disk drives as they were not ready yet [ [[:publications:quarter_century_of_unix|QCU]] pg 35], [ [[http://cm.bell-labs.com/cm/cs/who/dmr/hist.html]] ] | **Mid-year:** The PDP-11/20 is ordered, but it arrives with no disk drives as they were not ready yet [ [[:publications:quarter_century_of_unix|QCU]] pg 35], [ [[http://cm.bell-labs.com/cm/cs/who/dmr/hist.html]] ]. It sits in Joseph Osanna's office [ [[http://www.tuhs.org/Archive/Documentation/OralHistory/transcripts/thompson.htm|Thompson interview]] ]. |
| **Unknown:** Ken has recoded the Unix kernel and some commands in PDP-11 assembly code. Dennis writes: "Much of the recoding occurred before the disk was delivered. The basic system was running and executing commands, with a basic shell, cp and whatnot. The 12KWords were divided into 8KB for the system code and data, 8KB for running user programs, 8KB for an in-memory file system. This all used a cross-assembler written in B that ran on the PDP-7 and generated the -11 object programs." [ [[http://cm.bell-labs.com/cm/cs/who/dmr/chist.html]] ] | **Unknown:** Ken has recoded the Unix kernel and some commands in PDP-11 assembly code. Dennis writes: "Much of the recoding occurred before the disk was delivered. The basic system was running and executing commands, with a basic shell, cp and whatnot. The 12KWords were divided into 8KB for the system code and data, 8KB for running user programs, 8KB for an in-memory file system. This all used a cross-assembler written in B that ran on the PDP-7 and generated the -11 object programs." [ [[http://cm.bell-labs.com/cm/cs/who/dmr/chist.html]] ] |
