A survey of reconfigurable computer architectures is presented. This shows two distinct trends: data-flow architectures and dynamic architectures. If a broad classification of programs based on two kinds of parallelism in programs, i.e. instruction and data, is adopted, then a pooled-resource reconfigurable multiprocessor (PRRMP) system can be evolved. The salient features of such a system, including hardware and software aspects, are discussed in this paper.