Eric Dittman wrote:
 I found some QBUS boards that I can't identify from the field
 guide.  The numbers are:
 M8950
 M8951
 M8952
 M8953
 M8955
 M8958
 M8970
 M8971
 M8972
 M8973
  
According to the module list at 
http://pdp-8.org/mixed.txt
they are:
M8950    TM78,READ CHANNEL
M8951    TM78 ERROR CORRECTION BOARD
M8952    CRC + ACRC, TM78
M8953    READ PATH SEQUENCER, TM78
M8955    TM78 PORT
M8958    TM78 TRANSLATOR
M8970    STI INTERFACE MICRO BD (QUAD)
M8971    STI INTERFACE DRIVER BD (QUAD
M8972    TA78 MICROCOMPUTER, QUAD
M8973    8085 EXTENDED MEMORY,DBL8.5