Just to start with this great link
there is great literature available as well
in spite of this I will collect some and probably found some unknown
„/“ is the symbol for next row

• T.T./E.A
  • Trustees, Executor and Agency Company
• MBW
  • Melbourne Bourne of Works
• B&N
  • Buckley & Nunn
• AM/PS
  • Australian Mutual Provident Society
• RI/Co/LDr
  • Royal Insurance Co Ltd
• WMC
  • Working Mens College, Mellbourne
• Y
  • EL Yencken & Co, Melbourne