Computer programming 5 Computer programs 3 Operating systems (Computers) 3 Access control 2 Compiling (Electronic computers) 2 Computers 2 Parallel processing (Electronic computers) 2 ALGOL (Computer program language) 1 C.mmp (Computer) 1 Code generators 1 Correctness 1 Data protection 1 Data structures (Computer science) 1 Database management 1 Error-correcting codes (Information theory) 1 File organization (Computer science) 1 Multiprocessors 1 Pascal (Computer program language) 1 Programming 1 Programming languages (Electronic computers) 1 Storage fragmentation (Computer science) 1 Structured programming 1 System design 1 Testing 1 Verification 1 Virtual storage (Computer science) 1