The following tasks belong to the category COMBINATION:

- ADD
- Add a series of input subsets and one or another series of subsets. (aid.shl)
- AID
- Selects one of the tasks SUB, MUL, ADD, or DIV (aid.shl)
- COMBIN
- Combine sets to create new sets using mathematical expressions. (combin.shl)
- CONREM
- Removes continuum from channel maps by fitting a polynomial to the continuum channels. (conrem.c)
- CONREMCHEB
- Removes continuum from channel maps by fitting a polynomial or a Chebychev series to the continuum channels. (conrem.py)
- DIV
- Divides a series of input subsets by one or another series of subsets. (aid.shl)
- MEAN
- Program to calculate the mean of a number of subsets. (mean.shl)
- MUL
- Multiplies a series of input subsets with one or another series of subsets. (aid.shl)
- PATCH
- Find data values at positions of blanks interpolating the data in a small volume around the blanks. (PATCH)
- PROFIL
- Creates an integrated line profile over a selected area of an input data cube (profil.shl)
- SHUFFLE
- The programme shuffles profiles in a set so that they are aligned on positions taken from another set. (shuffle.c)
- SUB
- Subtract one or a series of subsets from another series of subsets. (aid.shl)
- SUM
- Program to add a number of subsets. (mean.shl)