human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Chain replication for supporting high throughput and availability"
  Abstract: Chain replication is a new approach to coordinating clusters of fail-stop storage servers. The approach is intended for supporting large-scale storage services that exhibit high throughput and availability without sacrificing strong consistency guarantees. Besides outlining the chain replication protocols themselves, simulation experiments explore the performance characteristics of a prototype implementation. Throughput, availability, and several object-placement strategies (including schemes based on distributed hash table routing) are discussed.

Connected through hyperedge HE-1 (induced by source paper "Are quorums an alternative for data replication"):
  with members:
    - "An analysis of the average message overhead in replica control protocols"

Connected through hyperedge HE-2 (induced by source paper "Towards fair sharing of block storage in a multi-tenant cloud"):
  with members:
    (none)

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science