Tema2 Informática

Introduction to Software in Computing

Overview of Software

• The discussion begins with an introduction to software, emphasizing its role as the intangible component of computers, which works alongside hardware.

• Software is categorized into three main types: system software, application software, and programming software.

Types of Software

System Software

• System software manages computer resources and facilitates communication between hardware and applications; examples include operating systems like Windows and Linux.

Application Software

• Application software consists of programs that users interact with for daily tasks such as document creation, spreadsheets, web browsing, and image editing.

Programming Software

• Programming software provides tools for developers to create applications using various programming languages; popular languages include JavaScript, Python, and Java.

Functions of Operating Systems

Role of the Operating System

• The operating system (OS) is crucial as it controls the execution of all applications on a computer. It is the first program executed upon startup.

• The OS monitors input/output operations and restricts access to prevent unauthorized entries while responding to user commands.

Multitasking Capabilities

• Operating systems enable multitasking by allocating processor time to multiple running programs simultaneously.

Error Management

• The OS informs users about errors or issues within the system, such as low disk space warnings that help prevent crashes or freezes.

Data Representation in Computers

Binary System Basics

• Computers use a binary system (0 and 1), where each bit represents a binary digit. A byte consists of 8 bits and can represent characters or symbols.

Storage Units Explained

• Various data sizes are defined:

• 1 byte = 8 bits,

• 1 KB = 1024 bytes,

• Document sizes can range from hundreds of KB to several GB for videos.

File Systems in Computing

Understanding File Systems

• A file system organizes how data is stored on devices through files and folders; folders can contain multiple files or subfolders.

Components of a File

• Name: Identifies the file,

• Extension: Indicates file type (e.g., .jpg),

• Icon: Visual representation associated with the file type.

Assignment Overview

Research Task Instructions

• Students are tasked with researching specific file extensions (e.g., .pdf, .zip).

• They must identify each extension's description, associated program for opening it, and its visual icon representation.