●●● ●●●● 2.1 Operating System Services :: ●● ●●●● ● Program execution The system must be able to load a program into memory run that program end execution, either normally or abnormally 〔 indicating error) 10 operations o A running program may require O, which may involve a file or an o device o The operating system must provide a means to operate l/o5 2.1 Operating System Services ⚫ Program execution ⚫ The system must be able to ▪ load a program into memory ▪ run that program ▪ end execution, either normally or abnormally (indicating error) ⚫ I/O operations ⚫ A running program may require I/O, which may involve a file or an I/O device ⚫ The operating system must provide a means to operate I/O