External Inquiry (EQ) - an elementary process with both input and output components that result in data retrieval from one or more internal logical files and external interface files. The input process does not update or maintain any FTRs (Internal Logical Files or External Interface Files) and the output side does not contain derived data.
Transactions between applications should be referred to as interfaces. You can only have an external output or external inquiry of data external to your application. If you get data from another application and add it to a file in your application, this is a combination get and add (external inquiry and external input).