The tapes directory contains dumps of IBM 1130 tapes.
The pictures directory contains pictures of the tapes.
The zip files of the same name contain the contents of those two directories
for easy downloading.

In the tapes director
The .tap files are dumps of the tapes in SIMH format documented in
   http://simh.trailing-edge.com/docs/simh_magtape.pdf
The .label files are information from the tape labels and what could
  determined about the tape contents
The .info files are information on the .tap files
The raw directories are the raw bytes of each file on the tape
The ascii directories are the files converted from EBCDIC to ASCII. Binary
  files are also converted but aren't going to be to useful.

The source code for the .tap file extractor is in the ibm_extract directory.

The tapes are
O1130CX14X and 1130CX14X
   1130 DATA PRESENTATION SYSTEM (for 1627 plotter)
1130CX11X
   NUMERICAL SURFACE TECHNIQUES AND CONTOUR MAP PLOTTING
1130SE25X
   1130 COMMERCIAL SUBROUTINE PACKAGE
O11302700001 and 1130270001
   Who knows
1130033001
   APL programming language
1130CX25X
   PROBLEM LANGUAGE ANALYZER (PLAN)
unlabeled
   Who knows

These tapes are from collection Thomas J. Kirk donated to the 
MidAtlantic Retro Computing Hobbyists (MARCH) Group 
http://www.midatlanticretro.org/

They were read by David Gesswein. You may contact me at djg@pdp8online.com.