This is an operating system used to carry out automatically many operating tasks, otherwise performed manually.
It controls the file-store, checks user's budgets and performs scheduling i.e. makes it possible to perform several jobs, of various kinds, simultaneously Multi-access is also organized by GEORGE 3 which allows a number of teletypewriters to be connected to the central processor through a multiplexor on a time-sharing basis.
These are available for the standard programming languages, FORTRAN, ALGOL and COBOL.
Their main function is to compile a source program but in addition some of then will also consolidate semi-compiled programs and execute object programs.
Five series of compilers are available: these in ascending order of complexity are S, P, J, Q and full series, providing facilities appropriate to each class of user.
A large number of applications packages developed by I.C.L. for use with the 1904A system are available in the J.U.C.C.:
PERT (Project Evaluation and Review Technique)
PROP (Profit Rating Of Projects)
NIC (Nineteen-hundred Indexing and Cataloguing)
Business management exercise
Horizontal curve setting out
Cut and fill
PROSPER (PROfit Simulation, Planning and Evaluation of Risk)
Storm Sewer analysis
Continuous beam analysis
Plane frame analysis
Space frame analysis
Pipe flow analysis
Closed circuit hot water pipe sizing
Three-phase AC short circuit
Perspective and isometric dravinj
Control and simulation language