““The big change has been in the hardware/software cost ratio. The buyer of a $2-million machine in 1960 felt that he could afford $250,000 more for a customized payroll program, one that slipped easily and nondisruptively into the computer-hostile social environment. Buyers of $50,000 office machines today cannot conceivably afford customized payroll programs; so they adapt their payroll procedures to the packages available.””
![“Lehman and Belady have studied the history of successive releases in a large operating system.[6] They find that the total number of modules increases linearly with release number, but that the number of modules affected increases exponentially with release number. All repairs tend to destroy the…” quote by Frederick P. Brooks Jr](https://sms4smile.com/quotes/img-quotes/115/frederick-p-brooks-jr-11230_history_lehman-and-belady-have-studied-the-histo_145780.jpg)
