41. Thus user programs cannot write or even read a program word, and data words cannot be executed. 42. This first card then instructed the machine to read more cards that eventually loaded a user program . 43. The company also announced a frequent user program , at $ 19 . 95 for 20 free hours. 44. A MIPS simulator executes the code for any user programs running on top of the Nachos operating system. 45. The machine connected to either a video monitor or to a user programs or the operating system, respectively. 46. No user program memory is available. 47. User programs cannot make these calls.48. This was risky, since it depended upon user programs to add and remove records in a manual subset. 49. Such schemes can be considered a type of block multithreading among the user program thread and the interrupt threads. 50. It said it will offer discounts for large users and will offer free calls as part of a frequent-user program .
