This blog post covers the top level ISO Message Definitions
acmt - Account Management
admi - Administration
auth - Authorities
caaa - Acceptor to Acuirer Card Transactions
caad - Card Administration
caam - ATM Management
cafc - Fee Collection
cafm - File Management
cafr - Fraud Reporting and Disposition
cain - Acquirer to Issuer Transactions
camt - Cash Management
canm - Network Management
casp - Sale to POI card Transactions
casr - Settlement Reporting
catm - Terminal Management
catp - ATM Card Transactions
colr - Collateral Management
fxtr - Foreign Exchange Trade
head - Business Application Header
pacs - Payments Clearing and Settlement
pain - Payments Initiation
reda - reference data
remt - Payments Remittance Advice
secl - Securities Clearing
seev - Securities Events
semt - Securities Management
sese - securities settlement
setr - securities trade
tsin - trade services initiation
tsmt - trade services management
tsrv - trade services
acmt - Account Management
admi - Administration
auth - Authorities
caaa - Acceptor to Acuirer Card Transactions
caad - Card Administration
caam - ATM Management
cafc - Fee Collection
cafm - File Management
cafr - Fraud Reporting and Disposition
cain - Acquirer to Issuer Transactions
camt - Cash Management
canm - Network Management
casp - Sale to POI card Transactions
casr - Settlement Reporting
catm - Terminal Management
catp - ATM Card Transactions
colr - Collateral Management
fxtr - Foreign Exchange Trade
head - Business Application Header
pacs - Payments Clearing and Settlement
pain - Payments Initiation
reda - reference data
remt - Payments Remittance Advice
secl - Securities Clearing
seev - Securities Events
semt - Securities Management
sese - securities settlement
setr - securities trade
tsin - trade services initiation
tsmt - trade services management
tsrv - trade services