classification: pseudo-instruction function 

 output control .LIST list output

 .XLIST list output interruption

 .MACRO Macro expansion output

 .XMACRO Macro expansion output stop

 .IF condition skip output

 .XIF condition skip output suspension 

 Others Read INCLUDE INCL file

 TITLE list title specification

 PAGE page break or number of lines per page

 RADIX radix designation