MSAs:
  10Bit
  200 Pin(aband.)
  300 Pin
  DWDM
  GBIC
  HSBI(aband.)
  SFF
  SFP
  QSFP
  X2
  XENPAK
  XFP
  XGP(aband.)
  XPAK(aband.)

This is a collection of material found on the Small Form Factor MSA:
Often also referred to as the 2 X 5 or 2 X 10 PTH (Pin Through Hole)

Original Small Form Factor (SFF-MSA)

Revised Small Form Factor (SFF-MSA) Jul.2000