This is a statement for running a SAS program called ABC.sas in batch mode. Batch mode is most commonly used with a scheduler to start the program automatically at a particular date and time on a regular basis. If you want to understand more about running SAS in batch mode under Windows this is a good place to start:
Need to connect to databases in SAS Viya? SAS’ David Ghan shows you two methods – via SAS/ACCESS LIBNAME and SAS Data Connector SASLIBS – in this video.