We discuss two computational approaches of particular significance for rigorous sociology, Agent-Based Computational Modeling (ABCM) and Computational Social Science (CSS). CSS exploits novel sources of large-scale data from, for example, the Internet, telephone-communication records, or population register data, studying digital traces of social interaction with great precision. ABCM uses computer simulation to study how social regularities can arise from complex interactions among interdependent individuals. CSS and ABCM share a strong focus on computational methods, but only a few contributions combine them. We briefly introduce both approaches and argue that they can strongly benefit from more interaction and integration. ABCM can addre...