Distributed-concurrent computing; UNIX (OPERATING SYSTEMS); Quantum chemistry; VERTEILTE ALGORITHMEN + PARALLELE ALGORITHMEN (PROGRAMMIERMETHODEN); QUANTUM CHEMISTRY; DISTRIBUTED APPLICATIONS + CLOUD COMPUTING + GRID COMPUTING (COMPUTER SYSTEMS); Client-server model; QUANTENCHEMIE; Supercomputing; DISTRIBUTED ALGORITHMS + PARALLEL ALGORITHMS (PROGRAMMING METHODS); FALLSTUDIEN (DOKUMENTENTYP); CASE STUDIES (DOCUMENT TYPE); MINICOMPUTERS + WORKSTATIONS (COMPUTER SYSTEMS); HOCHLEISTUNGSCOMPUTER + SUPERCOMPUTER (COMPUTERSYSTEME); VERTEILTE ANWENDUNGEN + CLOUD COMPUTING + GRID COMPUTING (COMPUTERSYSTEME); MINICOMPUTER + WORKSTATIONS (COMPUTERSYSTEME); UNIX (BETRIEBSSYSTEME); Remote procedure call; HIGH-PERFORMANCE COMPUTERS + SUPERCOMPUTERS (COMPUTER SYSTEMS); Heterogenous network