Computer Science Technology IT Notes PDF

💾 मेमोरी की यूनिट्स 💾 ➖➖➖➖➖➖➖➖➖➖➖➖ 1⃣: 1Bit (b) = Binary digit(0,1) 2⃣: 4 Bit = 1 Nibble 3⃣: 8 Bit = 1 Byte (B) 4⃣: 8 Bit/1 Byte = 1 Octet(o) 5⃣: 1024 Bytes = 1 kilo byte (KB) 6⃣: 1024 KB = 1 Mega byte (MB) 7⃣: 1024 MB = 1 Giga byte (GB) 8⃣: 1024 GB = 1 Terra byte (TB) 9⃣: 1024 TB = 1 Peta byte (PB) 🔟: 1024 PB = 1 Exa byte (EB) 1⃣1⃣: 1024 EB = 1 Zetta byte (ZB) 1⃣2⃣: 1024 ZB = 1 Yotta byte (YB) 1⃣3⃣: 1024 YB = 1 Bronto byte 1⃣4⃣: 1024 Brontobyte = 1 Geop byte Geop byte is the highest memory.

🖥 Computer Abbreviations (A) 🖥 ========================= 🔸 ACE➖Access Control Entry 🔸 ADSL➖Asymmetric Digital Subscriber Line 🔸 AGP➖Accelerated Graphics Port 🔸 AI➖Artificial Intelligence 🔸 ALGOL➖Algorithmic Language 🔸 ALU➖Arithmetic Logic Unit 🔸 ANSI➖American National Standards Institute 🔸 API➖Application Program Interface 🔸 ARPANET➖Advanced Research Projects Agency Network 🔸 ASCII➖American Standard Code For Information Interchange 🔸 ASP➖Active Server Pages 🔸 AUI➖Attachment Unit Interface 🔸 AVI➖Audio Video Interleave

THESE ARE THE MEANING OF THE FOLLOWING ABBREVIATIONS. ___________________________ 1.) GOOGLE - Global Organization Of Oriented Group Language Of Earth. 2.) YAHOO - Yet Another Hierarchical Officious Oracle. 3.) WINDOW - Wide Interactive Network Development for Office work Solution. 4.) COMPUTER - Common Oriented Machine Particularly United and used under Technical and Educational Research. 5.) VIRUS - Vital Information Resources Under Siege. 6.) UMTS - Universal Mobile Telecommunicati ons System. 7.) AMOLED - Active-matrix organic light-emitting diode. 8.) OLED - Organic light-emitting diode. 9.) IMEI - International Mobile Equipment Identity. 10.) ESN - Electronic Serial Number. 11.) UPS - Uninterruptible power supply. 12. HDMI - High-Definition Multimedia Interface. 13.) VPN - Virtual private network. 14.) APN - Access Point Name. 15.) SIM - Subscriber Identity Module. 16.) LED - Light emitting diode. 17.) DLNA - Digital Living Network Alliance. 18.) RAM - Random access memory. 19.) ROM - Read only memory. 20.) VGA - Video Graphics Array. 21.) QVGA - Quarter Video Graphics Array. 22.) WVGA - Wide video graphics array. 23.) WXGA - Widescreen Extended Graphics Array. 24.) USB - Universal serial Bus. 25.) WLAN - Wireless Local Area Network. 26.) PPI - Pixels Per Inch. 27.) LCD - Liquid Crystal Display. 28.) HSDPA - High speed down-link packet access. 29.) HSUPA - High-Speed Uplink Packet Access. 30.) HSPA - High Speed Packet Access. 31.) GPRS - General Packet Radio Service. 32.) EDGE - Enhanced Data Rates for Globa Evolution. 33.) NFC - Near field communication. 34.) OTG - On-the-go. 35.) S-LCD - Super Liquid Crystal Display. 36.) O.S - Operating system. 37.) SNS - Social network service. 38.) H.S - HOTSPOT. 39.) P.O.I - Point of interest. 40.) GPS - Global Positioning System. 41.) DVD - Digital Video Disk. 42.) DTP - Desk top publishing. 43.) DNSE - Digital natural sound engine. 44.) OVI - Ohio Video Intranet. 45.) CDMA - Code Division Multiple Access. 46.) WCDMA - Wide-band Code Division Multiple Access. 47.) GSM - Global System for Mobile Communications. 48.) WI-FI - Wireless Fidelity. 49.) DIVX - Digital internet video access. 50.) APK - Authenticated public key. 51.) J2ME - Java 2 micro edition. 52.) SIS - Installation 53.) DELL - Digital electronic link library. 54.) ACER - Acquisition Collaboration Experimentation Reflection. 55.) RSS - Really simple syndication. 56.) TFT - Thin film 57.) AMR- Adaptive Multi-Rate. 58.) MPEG - moving pictures experts group. 59.) IVRS - Interactive Voice Response System. 60.) HP - Hewlett Packard.

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✅ QUICK FACT COMPUTER : ONE LINER 1. Father of Computer - CHARLES BABBAGE 2. Father of Modern Computer Science - ALAN TURING 3. First Un Programmable Digital Computer - ATANASOFF BERRY COMPUTER (ABC) 4. First Electronic Digital Computer - ENIAC 5. ENIVAC stands for - ELECTRONIC NUMERIC INTEGRATOR AND CALCULATOR 6. World'S Fastest Computer - Sunway TaihuLight, in China. 7. India's Fastest Computer - PARAM SIDDHI AI 8. PARAM SIDDHI AI developed by - Centre for Development of Advanced Computing (CDAC) 💻 GENERATIONS OF COMPUTERS : 1. First Generation - (1940-56) - Vacuum tubes - Batch processing OS 2. Second Generation - (1956-63) - Transistors - Multi bag / Time sharing OS 3. Third Generation - (1964-71) - Integrated Circuits - Timesharing/ Real time OS 4. Fourth Generation - (1971-80) - Microprocessors - Real time/ Multi programming OS 5. Fifth Generation - (1980- present) - Semi conductors - Real time/ Multi programming OS 🕹 GENERATION LANGUAGE : 1st - Machine and Assembly language 2nd - Assembly language and high level languages (FORTRAN , COBOL) 3rd - High level languages (FORTRAN II - IV , COBOL , PASCAL , BASIC, ALGOL68) 4th - High level languages(FORTAN 77 , PASCAL , COBOL) 5th - High level languages(C , C++ ,JAVA , .NET)

Complete List of MS Excel Shortcut Key Ctrl+A - Select All Ctrl+B - Bold Ctrl+C - Copy Ctrl+D - Fill Down Ctrl+F - Find Ctrl+G - Goto Ctrl+H - Replace Ctrl+I - Italic Ctrl+K - Insert Hyperlink Ctrl+N - New Workbook Ctrl+O - Open Ctrl+P - Print Ctrl+R - Fill Right Ctrl+S - Save Ctrl+U - Underline Ctrl+V - Paste Ctrl W - Close Ctrl+X - Cut Ctrl+Y - Repeat Ctrl+Z - Undo F1 - Help F2 - Edit F3 - Paste Name F4 - Repeat last action F4 - While typing a formula, switch between absolute/relative refs F5 - Goto F6 - Next Pane F7 - Spell check F8 - Extend mode F9 - Recalculate all workbooks F10 - Activate Menubar F11 - New Chart F12 - Save As Ctrl+: - Insert Current Time Ctrl+; - Insert Current Date Ctrl+" - Copy Value from Cell Above Ctrl+’ - Copy Formula from Cell Above Shift - Hold down shift for additional functions in Excel’s menu Shift+F1 - What’s This? Shift+F2 - Edit cell comment Shift+F3 - Paste function into formula Shift+F4 - Find Next Shift+F5 - Find Shift+F6 - Previous Pane Shift+F8 - Add to selection Shift+F9 - Calculate active worksheet Shift+F10 - Display shortcut menu Shift+F11 - New worksheet Shift+F12 - Save Ctrl+F3 - Define name Ctrl+F4 - Close Ctrl+F5 - XL, Restore window size Ctrl+F6 - Next workbook window Shift+Ctrl+F6 - Previous workbook window Ctrl+F7 - Move window Ctrl+F8 - Resize window Ctrl+F9 - Minimize workbook Ctrl+F10 - Maximize or restore window Ctrl+F11 - Inset 4.0 Macro sheet Ctrl+F1 - File Open Alt+F1 - Insert Chart Alt+F2 - Save As Alt+F4 - Exit Alt+F8 - Macro dialog box Alt+F11 - Visual Basic Editor Ctrl+Shift+F3 - Create name by using names of row and column labels Ctrl+Shift+F6 - Previous Window Ctrl+Shift+F12 - Print Alt+Shift+F1 - New worksheet Alt+Shift+F2 - Save Alt+= - AutoSum Ctrl+` - Toggle Value/Formula display Ctrl+Shift+A - Insert argument names into formula Alt+Down arrow - Display AutoComplete list Alt+’ - Format Style dialog box Ctrl+Shift+~ - General format Ctrl+Shift+! - Comma format Ctrl+Shift+@ - Time format Ctrl+Shift+# - Date format Ctrl+Shift+$ - Currency format Ctrl+Shift+% - Percent format Ctrl+Shift+^ - Exponential format Ctrl+Shift+& - Place outline border around selected cells Ctrl+Shift+_ - Remove outline border Ctrl+Shift+* - Select current region Ctrl++ - Insert Ctrl+- - Delete Ctrl+1 - Format cells dialog box Ctrl+2 - Bold Ctrl+3 - Italic Ctrl+4 - Underline Ctrl+5 - Strikethrough Ctrl+6 - Show/Hide objects Ctrl+7 - Show/Hide Standard toolbar Ctrl+8 - Toggle Outline symbols Ctrl+9 - Hide rows Ctrl+0 - Hide columns Ctrl+Shift+( - Unhide rows Ctrl+Shift+) - Unhide columns Alt or F10 - Activate the menu Ctrl+Tab - In toolbar: next toolbar Shift+Ctrl+Tab - In toolbar: previous toolbar Ctrl+Tab - In a workbook: activate next workbook Shift+Ctrl+Tab - In a workbook: activate previous workbook Tab - Next tool Shift+Tab - Previous tool Enter - Do the command Shift+Ctrl+F - Font Drop Down List Shift+Ctrl+F+F - Font tab of Format Cell Dialog box Shift+Ctrl+P - Point size Drop Down List

✅ QUICK FACT COMPUTER : ONE LINER 1. Father of Computer - CHARLES BABBAGE 2. Father of Modern Computer Science - ALAN TURING 3. First Un Programmable Digital Computer - ATANASOFF BERRY COMPUTER (ABC) 4. First Electronic Digital Computer - ENIAC 5. ENIVAC stands for - ELECTRONIC NUMERIC INTEGRATOR AND CALCULATOR 6. World'S Fastest Computer - Sunway TaihuLight, in China. 7. India's Fastest Computer - PARAM SIDDHI AI 8. PARAM SIDDHI AI developed by - Centre for Development of Advanced Computing (CDAC) 💻 GENERATIONS OF COMPUTERS : 1. First Generation - (1940-56) - Vacuum tubes - Batch processing OS 2. Second Generation - (1956-63) - Transistors - Multi bag / Time sharing OS 3. Third Generation - (1964-71) - Integrated Circuits - Timesharing/ Real time OS 4. Fourth Generation - (1971-80) - Microprocessors - Real time/ Multi programming OS 5. Fifth Generation - (1980- present) - Semi conductors - Real time/ Multi programming OS 🕹 GENERATION LANGUAGE : 1st - Machine and Assembly language 2nd - Assembly language and high level languages (FORTRAN , COBOL) 3rd - High level languages (FORTRAN II - IV , COBOL , PASCAL , BASIC, ALGOL68) 4th - High level languages(FORTAN 77 , PASCAL , COBOL) 5th - High level languages(C , C++ ,JAVA , .NET)