As every nearring can be represented as a transformation nearring, i.e., is isomorphic to a subnearring of the full transformation nearring on a suitable group G, this kind of nearrings deserves special consideration. All basic algorithms for the construction and analysis of transformation nearrings, including the important special case of centralizer nearrings, have been implemented, and the function AsTransformationNearring constructs an appropriate transformation representation as above from any given nearring.