21. “ The motivation for these conferences was that the computer industry at large was having a great deal of trouble in producing large and complex software systems ”
22. “ d’Agapeyeff: An example of the kind of software system I am talking about is putting all the applications in a hospital on a computer, whereby you get a whole set of people to use the machine. This kind of system is very sensitive to weaknesses in the software, particular as regards the inability to maintain the system and to extend it freely ”
23. “ The point about this pyramid is that it is terribly sensitive to change in the underlying software such that the new version does not contain the old as a subset. It becomes very expensive to maintain these systems and to extend them while keeping them live”
24. “ It gained popularity in the 1980s as a solution to the problem of how to link newer applications to older legacy systems , although the term had been in use since 1968.” ANOS 80