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: "Leveraging legacy code to deploy desktop applications on the web"
  Abstract: Xax is a browser plugin model that enables developers to leverage existing tools, libraries, and entire programs to deliver feature-rich applications on the web. Xax employs a novel combination of mechanisms that collectively provide security, OS-independence, performance, and support for legacy code. These mechanisms include memory-isolated native code execution behind a narrow syscall interface, an abstraction layer that provides a consistent binary interface across operating systems, system services via hooks to existing browser mechanisms, and lightweight modifications to existing tool chains and code bases. We demonstrate a variety of applications and libraries from existing code bases, in several languages, produced with various tool chains, running in multiple browsers on multiple operating systems. With roughly two person-weeks of effort, we ported 3.3 million lines of code to Xax, including a PDF viewer, a Python interpreter, a speech synthesizer, and an OpenGL pipeline.

Connected through hyperedge HE-1 (induced by source paper "Safe kernel extensions without run-time checking"):
  with members:
    - "Dynamic function placement for data-intensive cluster computing"
    - "Programming languages for mobile code"
    - "TIL: a type-directed optimizing compiler for ML"
    - "Type-preserving compilation of Featherweight Java"
    - "A type system for certified binaries"

Connected through hyperedge HE-2 (induced by source paper "Embassies: radically refactoring the web"):
  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