🧠 Definition of a Computer:-
💬 A computer is an electronic device that can store, process, and retrieve data based on instructions (software) given to it.
✨ Think of it like:
🧠 Brain + 👐 Hands + 📚 Memory + 🗣️ Voice = COMPUTER!
⚙️ Characteristics of a Computer:-
Quality
Meaning
Speed
Can do millions of instructions per second ⚡
Accuracy
Mistakes only happen if we mess up 😭
Automation
Works by itself once the program runs 🤖
Versatility
Can write notes, play music, check weather 🎶📓🌦️
Diligence
Never gets tired, doesn't need coffee 😤☕
Storage
Saves huge amounts of data forever 🗃️💾
🧩 Components of a Computer System:-
There are 4 main pillars:
1️⃣ Hardware
💻 The physical parts you can touch.
Examples: Keyboard, Mouse, Monitor, CPU
💌 Think of it as the skeleton of the computer.
2️⃣ Software
📦 The set of instructions that tells the computer what to do.
Types of Software:
System Software: OS like Windows, Linux Application Software: Word, Browser, Insta 😌 Utility Software: Antivirus, Disk Cleaner
🧠 It's like the soul of the computer.
3️⃣ Data
📊 Raw facts & figures fed into the computer
Example:
"Me" = Data "I got 99% in Python" = Processed info 💁♀️
4️⃣ User
🧍♀️ That's YOU, bestie! The person who gives the instructions and uses the output 💻.
🧃 Input & Output Devices:-
Type
Example Devices
Description
Input
Keyboard, Mouse, Scanner
Used to enter data 💅
Output
Monitor, Printer, Speakers
Shows results 🖥️🔊
🧠 Memory Types (Main & Secondary):-
🔸 Primary Memory (Main):
Type
Description
RAM
Random Access Memory → Temporary, fast, forgets everything on shutdown 🧠✨
ROM
Read-Only Memory → Permanent, stores startup instructions 🛠️
🔹 Secondary Memory:
Type
Description
Hard Disk
Huge, slow, stores everything
SSD
Super-fast, expensive, modern 🏎️
USB Drive
Portable, fast, stores everything 🎵
🖥️ Block Diagram of Computer:-
Input Device
↓
[ Control Unit ]
[ ALU (Arithmetic/Logic) ]
[ Memory Unit ]
↓
Output Device
📍 Summary Flashcard (aesthetic af):-
🧠 COMPUTER SYSTEM = Hardware + Software + Data + User
💻 HARDWARE = physical
📦 SOFTWARE = soul
📊 DATA = raw facts
👩💻 USER = YOU
🗂️ MEMORY = RAM (fast+temporary) + ROM (permanent) + Storage
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Class 11 CS - code. caffeine. chaos.
Random⌨️ Welcome to my Computer Science dump zone - where the syntax breaks, the logic cries, and the vibe never dies 😭 💻 Class 11 • Science Stream (w/ Maths & CS) 🖋 Posting: - ✨Aesthetic digital notes - 💥 Programming concepts in simple words - 😵💫...
