ArtificialData          create artificial data for testing
CountColumns            count columns of files
FullJoin                create command to fully join multiple (more
                        than 2) files
FullJoinPairs           create command to fully join lines of two files
                        on a common field
LeftJoinPairs           create command to left join lines of two files
                        on a common field with no further options
MakeFIFOs               creates named Unix pipes, which gzipped files
                        can be streamed to for e.g. further joins
