IIRC, a complete PDP-11 set took up most of a
microfiche file box.
Wasn't this stuff also on-line at Digital once upon a time?  Names like
STARS and TIMA come to mind too (my spelling might be wildly wrong, of
course).  What happened to all that information? 
You're right... it did take up a full box...
As for Stars and TIMA, they're both around, and they still have some
pdp-11 related information, but they seem to have been purged of
much of it (One Architecture, One System, you know...)
                                        Megan Gentry
                                        Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL   | Internet (work): gentry(a)zk3.dec.com |
| Unix Support Engineering Group |          (home):  mbg(a)world.std.com |
| Digital Equipment Corporation  |                                     |
| 110 Spitbrook Rd. ZK03-2/T43   | URL:     
http://world.std.com/~mbg/ |
| Nashua, NH 03062               | "pdp-11 programmer - some assembler |
| (603) 884 1055                 |  required." - mbg                   |
+--------------------------------+-------------------------------------+