Ict notes

Got you! This is core *ICT Chapter 1* stuff 👇

*1. SOFTWARE SYSTEM*

*Software* = The set of instructions/programs that tell the computer what to do.

Without software, hardware is just a dead box.

*Software System = 2 Main Types*

*A. Operating Software / Operating System (OS)*

*What*: The master software that manages the computer

*Job*: Controls hardware, manages files, runs other programs, gives user interface

*Analogy*: OS = Manager of the office. It decides who does what.

*Examples*:

1. *Windows* - PCs, laptops. Ex: Windows 11

2. *macOS* - Apple laptops/desktops

3. *Linux* - Servers, programmers. Ex: Ubuntu

4. *Android* - Mobile phones

5. *iOS* - iPhones, iPads

*Key Functions*: Booting, Memory management, File management, Security

*B. Application Software*

*What*: Programs made for users to do specific tasks

*Job*: Helps YOU do work, study, fun

*Analogy*: Apps = Workers in the office. Each has one job.

*Types of Application Software:*

Type What it does Examples

**General Purpose** Used by everyone MS Word, Excel, PowerPoint, Chrome, Paint

**Special Purpose** Made for one specific job Photoshop - editing, AutoCAD - design, Banking software

**Utility Software** Keeps computer healthy Antivirus, Disk Cleanup, WinRAR

**Entertainment** For fun Games, VLC, Spotify, YouTube

*OS vs Application - Quick Difference*

OS runs first and runs apps. Apps can't run without OS.

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*2. TYPES OF COMPUTERS WITH USAGE & EXAMPLES*

Type Size & Power Usage Examples

**1. Micro Computer** Small, 1 user Home, office, school **PC, Laptop, Tablet, Smartphone**

**2. Mini Computer** Medium, multiple users Small companies, labs Used for database, payroll

**3. Mainframe Computer** Large, powerful Big companies, banks Handles thousands of users at once. Ex: Bank transaction system

**4. Super Computer** Very large, fastest Scientific research Weather forecasting, NASA, nuclear research. Ex: Fugaku, Summit

*2 More based on purpose:*

- *Analog Computer* - Measures continuous data. Ex: Speedometer

- *Digital Computer* - Works on 0 and 1. Ex: Your laptop

- *Hybrid Computer* - Mix of both. Ex: ECG machine in hospital

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*3. USAGE OF COMPUTERS IN DAILY LIFE*

Computers are literally everywhere now 👇

Area How Computers Are Used Example

**1. Education** Online classes, research, typing Zoom, Google Classroom, MS Word

**2. Banking** ATM, online transfer, record keeping JazzCash, Easypaisa, ATM machine

**3. Healthcare** Patient records, X-ray, surgery ECG machine, Hospital database

**4. Communication** Chatting, video calls, email WhatsApp, Gmail, Instagram

**5. Business** Billing, stock, advertising POS in shops, Excel sheets

**6. Entertainment** Games, movies, music, social media TikTok, Netflix, PUBG

**7. Transportation** Ticket booking, traffic control, GPS Uber, Google Maps, Airline system

**8. Government** CNIC database, tax filing, e-governance NADRA, FBR online

**9. Home** Smart TV, security camera, bill payment Smart fridge, Online shopping

*Summary*: Computers save time, reduce errors, and store huge