The Working Spectrum is based on a collection of solid sophisticated programs in areas such as data storage, finance, calculation, graphics, household management and education.
Each of the programs is explained in details, line by line. And each of the programs is built up out of general purpose subroutines and modules which, once understood, can form the basis of any other programs you need to write.
Advanced programming techniques spring out of the discussions explaining each subroutine. The result is not only to advance your programming skills but also to leave you with a wide range or practical applications programs which might otherwise only be available tot hose prepared to buy cassettes or those capable of writing substantial programs for themselves.