01 - Systems
OT - Operational Technology
- Everything that has to do with monitoring and control of devices, equipment, processes and events in an organization.
System
- Combination of elements that work together to achieve a common goal.
- Set of components for collecting, processing and handling data and information.
CPU - Central Procesing Unit
- Runs programs, sequences of instructions.
Memory Unit
- Stores data and instructions.
I/O Unit
- Input/Output Unit, communicates with the outside world.
Interconnection Subsystem
- Connects system components and allows them to exchange information
Viewpoints
Users
- End User - May not even be aware of interacting with a system.
- Computer User - Uses the system as a service provider and command interpreter. More knowledgeable.
Programmers
- High level language programmer - Sees system as virtual machine capable of executing the instructions adopted by the programming language
- Assembly level programmer - Sees the system as an interconnect of functional units that execute machine instructions defined by the ISA, Instruction Set Architecture.
Designers
- System Designer - Sees the system as a set of components that interact with each other.
- Hardware Designer - Sees the system as a set of interconnected subsystems.