FORTRAN (Computer program language) Data processing 20 Computer programming 10 Boundary element methods 8 Numerical analysis 8 Science 6 Computer programs 5 Engineering 5 CSMP (Computer program language) 4 Mathematics 4 Physics 4 C (Computer program language) 3 C++ (Computer program language) 3 Operating systems (Computers) 3 BASIC (Computer program language) 2 Compiling (Electronic computers) 2 Computer programmes 2 Laboratory manuals 2 Mathematical physics 2 Numerical calculations 2 Pascal (Computer program language) 2 Programming (Electronic computers) 2 Chemical processes 1 Parallel programming (Computer science) 1 Science data processing 1 Strains and stresses 1 Structured programming 1