System Functions

⎕A (Uppercase English Alphabet) ⎕AT (Object Attributes) ⎕AV (Atomic Vector) ⎕CR (Canonical Representation) ⎕DM (Diagnostic Message) ⎕DR (Data Representation) ⎕EA (Execute Alternate) ⎕EC (Execute Controlled) ⎕EM (Event Message)

⎕ERROR (Signal Error) ⎕ES (Event Simulate) ⎕ET (Event Type) ⎕FMT (Format) ⎕MF (Monitor Function) ⎕Nxxx (Native File Functions) ⎕NC (Name Class) ⎕NL (Name List)

⎕SYSID (System Identifier) ⎕SYSVER (System Version) ⎕TC/⎕TCxxx (Terminal Control) ⎕TF (Transfer Form) ⎕UCS (Universal Character Set) ⎕VR (Visual Representation) ⎕WA (Workspace Available)