FRU P/N <- ??? -> OPT P/N - MKT P/N Original page

Welcome to the gender-bender, heart's in a blender side of IBM. Numbers may change over the years, due to Engineering Changers, addition of more supported machines, price changes, mere whims, whatever. So, you may find an unknown P/N that looks like it might work, but it isn't listed.

  Documentation of PS/2 stuff ranges from real early (1987) to very late (1995-ish), and during that time, IBM updated the P/Ns to reflect new models, updated parts, and deleted obsolete / outdated P/Ns.

So, for a "missing" P/N, search the internet, ask a question on, compare the closest match... IBM used a FRU / OPT combination, where the FRU and OPT P/Ns differed by one or two (say 53G3996 / 53G3997). Sometimes, the FRU and OPT are the same.

Note: FAIK, IBM used every possible combination of FRU / OPT / MKT / MFR P/Ns just to confuse us. You may see one or more stickers, and the numbers may be clearly identified as "FRU"... or maybe not.

Where, what is different ...

FRU P/N : Field Replaceable Unit - part number (Spare Part).
     This is the smallest part a technician is allowed/can replace.

     A FRU package will be shipped without any supporting material.

  Ordering SIMM memory with the OPT P/N - you may receive two SIMMs
   (depends on machine type, e.g. 64MB SIMM OPTION memory = 2x 32MB SIMMs.)

         Otherwise if you use the FRU P/N, only one SIMM will be received (1x 32MB), this is because a FRU is defined for repair actions, and normally, two SIMMs at the same time will not be defect.

         If you order a PCMCIA modem-card and use the FRU P/N, you will not receive any cable, adapter, software and setup/installation manual with this FRU package.

     RULE for FRU P/Ns - a FRU-part should/cannot be used for machine/option upgrades.

OPT P/N : OPTION part number
     A Customer (end-user) will receive an OPTION package (OBI - Options By IBM)
    There is no special knowledge needed for OBI installation.
    A step by step, detailed instruction is included in the User's Guide.

Such an OPTION-package will include:
         Warranty Certificate Registration sheet
         User's Guide Installation, setup and test instructions
         Software Diskette and/or CD-ROM with driver and/or software needed
         Hardware part(s) Mounting material - cable, bezel, screws ... 

MKT P/N : MARKETING part number  
     This MKT P/N can define a MACHINE or OPTION upgrade package.
    There is some special knowledge needed for installation - however,  installation instructions are included

Such a package can include:
         Warranty Certificate Registration sheet
         Installation/test instructions
         Hardware part(s)

MFG P/N : MANUFACTURE part number  
     Such (rare) MFG P/N can not be used for parts order.
     (The MFG P/N is only known/used for machine production, in plant's.)

Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 08 May 2024 - Changelog | About | Legal & Contact