For continuum projects the data pipeline must subtract the atmospheric contribution, in a way that depends of course on the actual observing mode. For line data it must subtract measurements obtained on an OFF position if needed, normalize by gains to scale the data into temperature units; it must also subtract spectral baselines. The pipeline must be able to grid the data for imaging. It must display the results at the various stages. If these total power measurements are obtained by a sub-array while the other antennas are used for the cross correlations for the same target, the calibrations should be able to proceed in parallel such that when imaging both data sets are ready to be combined when the imaging stage begins.