Contact a few information systems professionals and ask them what types of operating systems they use in their organizations. (Alternatively, you may browse through articles in business periodicals for the same information.) Fill in the table with information about the operating systems used
in four different organizations. Also, give reasons for each company's choice of operating systems.

Roger ginde is developing a program in supply chain management certification for managers. ginde has listed a number of activities that must be completed before a training program of this nature could be conducted. the activities, immediate predecessors, and times appear in the accompanying table: activity immediate predecessor(s) time (days) a -− 44b -− 55 c -− 11 d b 1010 e a, d 55 f c 55 g e, f 1010 calculate the slack time. show the details.