Abraham Silberschatz, Peter B. Galvin, Greg Gagne - Operating System Concepts

Date: 2021-09-09
| Idle lawyers tend to become politicians, so there is a certain
| social value in keeping lawyers busy
Chapter: 1.4 Operating-System Structure


Date: 2021-09-09
| A program loaded into memory and executing is called a process
Chapter: 1.4 Operating-System Structure


Date: 2021-09-09
| As mentioned earlier, modern operating systems are interrupt
| driven. If there are no processes to execute, no I/O devices to
| service, and no users to whom to respond, an operating system will
| sit quietly, waiting for something to happen
Chapter: 1.5 Operating-System Operations


Date: 2021-09-10
| As noted earlier, the main memory is generally the only large storage
| device that the CPU is able to address and access directly. For
| example, for the CPU to process data from disk, those data must first
| be transferred to main memory by CPU-generated I/O calls. In the
| same way, instructions must be in memory for the CPU to execute them
Chapter: 1.7 Memory Management


Date: 2021-09-10
| Main memory is the only large storage area that the processor can
| access directly
Chapter: 1.14 Summary