# EPOC OPL Guide & Reference Glossary

## Index R

Term | Topic | Meaning | See Also
recogniser | Advanced Topics | What EPOC uses to recognise files. Recognisers are located in `\System\Recogs\`. | MIME
record | Data File Handling | An entry in a database. These correspond to the rows in a database table. Each record can have multiple fields. | database, field, table, view
return | OPL Basics | For a function; to provide a value in the place where the function was called. The return value is the function’s output. | function, value, call
RFC | Advanced Topics | Request For Comments. A document describing proposed changes to recognised Internet standards, or new standards for applications to adopt. | MIME
run | Introducing OPL | To start (a program). | program