How computers work: software basics

This lesson focuses on how computers work: software basics. Interdisciplinary approaches reveal connections that single-subject study might miss.

A computer is a programmable electronic device that processes data according to instructions. Hardware is the physical components: CPU (Central Processing Unit—the "brain" that executes instructions), RAM (Random Access Memory—temporary working memory), storage (hard drive or SSD—permanent memory), input devices (keyboard, mouse, microphone), output devices (monitor, speakers, printer), motherboard (connects all components). Software is the set of instructions: System software (operating system like Windows, macOS, Linux—manages hardware and provides services to other programs), Application software (browsers, word processors, games—specific tasks). The operating system manages files, runs programs, and provides a user interface. Digital literacy means knowing how to use technology effectively, safely, and ethically—finding reliable information, protecting privacy, communicating respectfully online, and understanding how digital systems work.

As you engage with this material, consider both the theoretical foundations and practical applications. Think critically about how this concept builds on prior knowledge and where you might apply it beyond the classroom.

Challenge yourself to go beyond memorization—seek to understand the "why" behind the processes and principles.