Showing posts with label Computer Information. Show all posts
Showing posts with label Computer Information. Show all posts

Thursday, 7 February 2019

Computer General Knowledge

 Computer General Knowledge

Half byte = 1nibble - Bit means Binary Digit - 1 byte - 1 byte - 1-kilobyte - A combination of 16 pieces are called word. A terabyte = 1 trillion byte - Our Personal Computer Belongs to 4th generation - Fred Cohen coined the term computer virus - Original computer virus was made in 1970 at Bell labs - WORM signifies Write Once Read Many - Electricity of a supercomputer is measured at FLOPS - WWW\/http: Was made by Tim Burner Lee at 1992 - Intel signifies Integrated Electronics - 1 worksheet comprises 256 columns - G.W.Basic G.W stands for Mid Way - Super Computer was made by J.H.Van Tassel - CORBA is a Common Object Request Broker Architecture - URL is Uniform or Universal Resource Locator - Intel devised Memory Chip - Information stored on disc as string of bumps on its shiny side. 

DVDs hold more info than CDs. They have two layers that are reflective and utilize bumps-. There are spots of color on the disc to change the laser light that is - In 1951 Univac 1 John Mauchly and J. Designed first computer, Presper Eckert. They built ENIAC, that the first electronic computer in 1946 - In 1968 mainframe was built. In 1976 first supercomputer that the Cray-1 was developed - In 1981 IBM produces the IBM PC. In 1998 IBM made quantum computer - Supercomputers use parallel boration - In 1974, computer games have been introduced. 

ROM is the abbreviation of programmable read-only memory. RAM is that the abbreviation of  Read Acces memory. What was that the worlds first high level programming language 1957: IBM FORTRAN - A JPEG is an image file format - what does JPEG stand for Joint Photographic Experts Group - During World War II, IBM built the computers the Nazis used to manage their death\/concentration camps - Registers are temporary memory areas within the CPU. Original Apple computer was built in a garage. The language of small talk is object-oriented. Shell is a working environment. Virtual memory is also known as a virtual page. NOS refers to OS for a network. 

In EBCDIC every character is indicated with 8 bits. Diodes are utilized in analog computer circuits as a limiter. Wetware stands for any organic intelligence. GIGO stands for trash in trash out. Application of flip flaps are counters, shift register, and transfer register. Bootstrap is associated with the computer. FORTRAN stands for formula translator. A group of character that's termed as a single entity is known as a word. Clip art is a pc prepared art. Mark sensing is just another term for OMR. Authorization to make multiple software copies is known as site licensing. Antivirus is also known as vaccines. Free software i

Sunday, 27 January 2019

Hard Drive Data Recovery Services

Hard Drive Data Recovery Services

Hard Drive Data Recovery Services
The one thing that manufacturers of hard disk drive don't tell us whenever we buy our completely new computers, is they're subject to fail, irrespective of the period of time they're used. With a few systems, it may take over 10 years before a malfunction occurs, while others may fail within only a year of regular use. Due to this, data retrieval is an essential issue that requires some thought. Fundamentally, there are basically two kinds of hard disk drive failure. The first is and the second category applies in case of a malfunction that is physical. Comparable to the first class, the hard disk drive data retrieval is considered when the information on the drive becomes corrupted such as a partition table, boot record that was damaged, or root directory information that was missing. 

Lots of experts feel that the hard disk drive failure because of applications is easier to recuperate with retrieval software's use. You need to recover information from a hard disk drive that has invisibly it entails a process. Because when the drive has been damaged in some manner, then any access into the driveway can cause corruption into the information stored on the 32, It's. It is harder for your hard disk drive data retrieval process to obtain the files and stored back info. Vast majority of the data retrieval services you'll see advertised can be obtained for this class. 

Remember that a higher degree of care is needed in order your recovery is powerful if you are unfortunate enough to need a hard disk drive data recovery. When you're considering using any one of the failed software that's available, you'll need to bear in mind that there'll be a danger of further data loss as the program gets to work on the hard disk drive. Among the best ways to avoid an extra harm is to create an image of your driveway using an imaging tool. If for example, your hard disk drive happens to be the drive that comprises the OS, the best failed hard disk drive data recovery measure you may take isn't to boot the driveway at all if this is possible. In accordance with the experts, this particular is reasonably simple to get a desktop system - all you should do is to disconnect the boot driveway and replace it with a brand new drive. For this to be completely powerful you need to ensure that you've got a drive with a big sufficient capacity to hold the picture of the current drive.

Monday, 14 January 2019

Computer Popular Abbreviation

  Computer Abbreviation 

Computer Popular Abbreviation
1. SIM— Subscriber Identity Module
2. 3G — 3rd Generation.
3. Wi-Fi— Wireless Fidelity
4. MP3— MPEG player lll
5. MP4— MPEG-4 video file
6. CD— Compact Disk
7. DVD— Digital Versatile Disk
8. USB— Universal Serial Bus
9. 3GP— 3rd Generation Project
10. CRT— Cathode Ray Tube
11. AVI— Audio Video Interleave
12. HTML— Hyper Text Markup Language
13. HTTP— Hyper Text Transfer Protocol.
14. GPRS— General Packet Radio Service.
15. CDMA — Code Divison Multiple Access.
16. JPEG— Joint Photographic Expert Group
17. GSM — Global System for Mobile Communication.
18. VIRUS— Vital Information Resource Under Seized.
19. AM/FM— Amplitude/Frequency Modulation.
20. PDF— Portable Document Format

Sunday, 13 January 2019

Computer Hardware And Their Inventors

Computer Hardware Inventors

1.  First Keyboard made by Herman Hollerith, first keypunch devices in 1930’ZZ
2.  first Computer Mouse: Douglas Engelbart (1964)
3. RAM: An Wang and Jay Forrester (1951)
4. Trackball: Tom Cranston and Fred Longstaff (1952)
5. Hard Disk: IBM, The IBM Model 350 Disk File (1956)
6.  The first Integrated Circuit made by Jack Kilby & Robert Noyce (1958)
7. Transistor: John Bardeen, Walter Brattain & Wiliam Shockley (1947-48)
8. Laser printer:  made by Gary Starkweather an in 1969.
9.  First Floppy Disk made by Alan Shugart & IBM ( 1970)
10. The first Microprocessor made Faggin, Hoff & Mazor – Intel 4004 (1971)
11. First Portable Computer: is made IBM 1500 in 1975
12. April 4, 1975, Microsoft made by Bill Gates
13. First Apple Computer: Apple  made in  1976
14. First IBM Computer  is IBM 5150  is made  in 1981
15. Nvidia: Founded  in 1993
16. First USB: made in 1996, Designed by Compaq
17. First Wireless mouse: made in 1999 by Microsoft
18. First iPod: Released in 2001
19 first keyboard made by Christopher Sholes 1868
20 Scanner:- Rudolph Hell in Germany (1963)
CD-ROM: made by-James Russell  in 1965
22 DVD-ROM  made by Pioneer (1999)
Prepared By. Shafique Ahmad


Thursday, 3 January 2019

Computer Basic Important Shortcut Keys

Computer_Science  Important Shortcut Keys

Computer  Basic Important Shortcut Keys



  1. CTRL+A. . . . . . . . . . . . . . . . . Select All
  2. CTRL+C. . . . . . . . . . . . . . . . . Copy
  3. CTRL+X. . . . . . . . . . . . . . . . . Cut
  4. CTRL+V. . . . . . . . . . . . . . . . . Paste
  5. CTRL+Z. . . . . . . . . . . . . . . . . Undo
  6. CTRL+B. . . . . . . . . . . . . . . . . Bold
  7. CTRL+U. . . . . . . . . . . . . . . . . Underline
  8. CTRL+I . . . . . . . . . . . . . . . . . Italic
  9. F1 . . . . . . . . . . . . . . . . . . . . . . Help
  10. F2 . . . . . . . . . . . . . . . . . . . . . Rename selected object
  11. F3 . . . . . . . . . . . . . . . . . . . . . Find all files
  12. F4 . . . . . . . . . . . . . . . . . . . . . Opens file list drop-down in dialogs
  13. F5 . . . . . . . . . . . . . . . . . . . . . Refresh current window
  14. F6 . . . . . . . . . . . . . . . . . . . . . Shifts focus in Windows Explorer
  15. F10 . . . . . . . . . . . . . . . . . . . . Activates menu bar options
  16. ALT+TAB . . . . . . . . . . . . . . . . Cycles between open applications
  17. ALT+F4 . . . . . . . . . . . . . . . . . Quit program, close current window
  18. ALT+F6 . . . . . . . . . . . . . . . . . Switch between current program windows
  19. ALT+ENTER. . . . . . . . . . . . . . Opens properties dialog
  20. ALT+SPACE . . . . . . . . . . . . . . System menu for current window
  21. ALT+¢ . . . . . . . . . . . . . . . . . . opens drop-down lists in dialog boxes
  22. BACKSPACE . . . . . . . . . . . . . Switch to parent folder
  23. CTRL+ESC . . . . . . . . . . . . . . Opens Start menu
  24. CTRL+ALT+DEL . . . . . . . . . . Opens task manager, reboots the computer
  25. CTRL+TAB . . . . . . . . . . . . . . Move through property tabs
  26. CTRL+SHIFT+DRAG . . . . . . . Create shortcut (also right-click, drag)
  27. CTRL+DRAG . . . . . . . . . . . . . Copy File
  28. ESC . . . . . . . . . . . . . . . . . . . Cancel last function
  29. SHIFT . . . . . . . . . . . . . . . . . . Press/hold SHIFT, insert CD-ROM to bypass auto-play
  30. SHIFT+DRAG . . . . . . . . . . . . Move file
  31. SHIFT+F10. . . . . . . . . . . . . . . Opens context menu (same as right-click)
  32. SHIFT+DELETE . . . . . . . . . . . Full wipe delete (bypasses Recycle Bin)
  33. ALT+underlined letter . . . . Opens the corresponding menu
  34. PC Keyboard Shortcuts
  35. Document Cursor Controls
  36. HOME . . . . . . . . . . . . . . to beginning of line or far left of field or screen
  37. END . . . . . . . . . . . . . . . . to end of line, or far right of field or screen
  38. CTRL+HOME . . . . . . . . to the top
  39. CTRL+END . . . . . . . . . . to the bottom
  40. PAGE UP . . . . . . . . . . . . moves document or dialog box up one page
  41. PAGE DOWN . . . . . . . . moves document or dialog down one page
  42. ARROW KEYS . . . . . . . move focus in documents, dialogs, etc.
  43. CTRL+ > . . . . . . . . . . . . next word
  44. CTRL+SHIFT+ > . . . . . . selects word
  45. Windows Explorer Tree Control
  46. Numeric Keypad * . . . Expand all under current selection
  47. Numeric Keypad + . . . Expands current selection
  48. Numeric Keypad – . . . Collapses current selection
  49. ¦ . . . . . . . . . . . . . . . . . . Expand current selection or go to first child
  50. ‰ . . . . . . . . . . . . . . . . . . Collapse current selection or go to parent
  51. Special Characters
  52. ‘ Opening single quote . . . alt 0145
  53. ’ Closing single quote . . . . alt 0146
  54. “ Opening double quote . . . alt 0147
  55. “ Closing double quote. . . . alt 0148
  56. – En dash. . . . . . . . . . . . . . . alt 0150
  57. — Em dash . . . . . . . . . . . . . . alt 0151
  58. … Ellipsis. . . . . . . . . . . . . . . . alt 0133
  59. • Bullet . . . . . . . . . . . . . . . . alt 0149
  60. ®️ Registration Mark . . . . . . . alt 0174
  61. ©️ Copyright . . . . . . . . . . . . . alt 0169
  62. ™️ Trademark . . . . . . . . . . . . alt 0153
  63. ° Degree symbol. . . . . . . . . alt 0176
  64. ¢ Cent sign . . . . . . . . . . . . . alt 0162
  65. 1⁄4 . . . . . . . . . . . . . . . . . . . . . alt 0188
  66. 1⁄2 . . . . . . . . . . . . . . . . . . . . . alt 0189
  67. 3⁄4 . . . . . . . . . . . . . . . . . . . . . alt 0190
  68. PC Keyboard Shortcuts
  69. Creating unique images in a uniform world! Creating unique images in a uniform world!
  70. é . . . . . . . . . . . . . . . alt 0233
  71. É . . . . . . . . . . . . . . . alt 0201
  72. ñ . . . . . . . . . . . . . . . alt 0241
  73. ÷ . . . . . . . . . . . . . . . alt 0247
  74. File menu options in current program
  75. Alt + E Edit options in current program
  76. F1 Universal help (for all programs)
  77. Ctrl + A Select all text
  78. Ctrl + X Cut selected item
  79. Shift + Del Cut selected item
  80. Ctrl + C Copy selected item
  81. Ctrl + Ins Copy selected item
  82. Ctrl + V Paste
  83. Shift + Ins Paste
  84. Home Go to beginning of current line
  85. Ctrl + Home Go to beginning of document
  86. End Go to end of current line
  87. Ctrl + End Go to end of document
  88. Shift + Home Highlight from current position to beginning of line
  89. Shift + End Highlight from current position to end of line
  90. Ctrl + f Move one word to the left at a time
  91. Ctrl + g Move one word to the right at a time
  92. MICROSOFT®️ WINDOWS®️ SHORTCUT KEYS
  93. Alt + Tab Switch between open applications
  94. Alt +
  95. Shift + Tab
  96. Switch backwards between open
  97. applications
  98. Alt + Print
  99. Screen
  100. Create screen shot for current program
  101. Ctrl + Alt + Del Reboot/Windows®️ task manager
  102. Ctrl + Esc Bring up start menu
  103. Alt + Esc Switch between applications on taskbar
  104. F2 Rename selected icon
  105. F3 Start find from desktop
  106. F4 Open the drive selection when browsing
  107. F5 Refresh contents
  108. Alt + F4 Close current open program
  109. Ctrl + F4 Close window in program
  110. Ctrl + Plus
  111. Key
  112. Automatically adjust widths of all columns
  113. in Windows Explorer
  114. Alt + Enter Open properties window of selected icon
  115. or program
  116. Shift + F10 Simulate right-click on selected item
  117. Shift + Del Delete programs/files permanently
  118. Holding Shift
  119. During Bootup
  120. Boot safe mode or bypass system files
  121. Holding Shift
  122. During Bootup
  123. When putting in an audio CD, will prevent
  124. CD Player from playing
  125. WINKEY SHORTCUTS
  126. WINKEY + D Bring desktop to the top of other windows
  127. WINKEY + M Minimize all windows
  128. WINKEY +
  129. SHIFT + M
  130. Undo the minimize done by WINKEY + M
  131. and WINKEY + D
  132. WINKEY + E Open Microsoft Explorer
  133. WINKEY + Tab Cycle through open programs on taskbar
  134. WINKEY + F Display the Windows®️ Search/Find feature
  135. WINKEY +
  136. CTRL + F
  137. Display the search for computers window
  138. WINKEY + F1 Display the Microsoft®️ Windows®️ help
  139. WINKEY + R Open the run window
  140. WINKEY +
  141. Pause /Break
  142. Open the system properties window
  143. WINKEY + U Open utility manager
  144. WINKEY + L Lock the computer (Windows XP®️ & later)
  145. OUTLOOK®️ SHORTCUT KEYS
  146. Alt + S Send the email
  147. Ctrl + C Copy selected text
  148. Ctrl + X Cut selected text
  149. Ctrl + P Open print dialog box
  150. Ctrl + K Complete name/email typed in address bar
  151. Ctrl + B Bold highlighted selection
  152. Ctrl + I Italicize highlighted selection
  153. Ctrl + U Underline highlighted selection
  154. Ctrl + R Reply to an email
  155. Ctrl + F Forward an email
  156. Ctrl + N Create a new email
  157. Ctrl + Shift + A Create a new appointment to your calendar
  158. Ctrl + Shift + O Open the outbox
  159. Ctrl + Shift + I Open the inbox
  160. Ctrl + Shift + K Add a new task
  161. Ctrl + Shift + C Create a new contact
  162. Ctrl + Shift+ J Create a new journal entry
  163. WORD®️ SHORTCUT KEYS
  164. Ctrl + A Select all contents of the page
  165. Ctrl + B Bold highlighted selection
  166. Ctrl + C Copy selected text
  167. Ctrl + X Cut selected text
  168. Ctrl + N Open new/blank document
  169. Ctrl + O Open options
  170. Ctrl + P Open the print window
  171. Ctrl + F Open find box
  172. Ctrl + I Italicize highlighted selection
  173. Ctrl + K Insert link
  174. Ctrl + U Underline highlighted selection
  175. Ctrl + V Paste
  176. Ctrl + Y Redo the last action performed
  177. Ctrl + Z Undo last action
  178. Ctrl + G Find and replace options
  179. Ctrl + H Find and replace options
  180. Ctrl + J Justify paragraph alignment
  181. Ctrl + L Align selected text or line to the left
  182. Ctrl + Q Align selected paragraph to the left
  183. Ctrl + E Align selected text or line to the center
  184. Ctrl + R Align selected text or line to the right
  185. Ctrl + M Indent the paragraph
  186. Ctrl + T Hanging indent
  187. Ctrl + D Font options
  188. Ctrl + Shift + F Change the font
  189. Ctrl + Shift + > Increase selected font +1
  190. Ctrl + ] Increase selected font +1
  191. Ctrl + Shift + < Decrease selected font -1
  192. Ctrl + [ Decrease selected font -1
  193. Ctrl + Shift + * View or hide non printing characters
  194. Ctrl + f Move one word to the left
  195. Ctrl + g Move one word to the right
  196. Ctrl + h Move to beginning of the line or paragraph
  197. Ctrl + i Move to the end of the paragraph
  198. Ctrl + Del Delete word to right of cursor
  199. Ctrl + Backspace Delete word to left of cursor
  200. Ctrl + End Move cursor to end of document
  201. Ctrl + Home Move cursor to beginning of document
  202. Ctrl + Space Reset highlighted text to default font
  203. Ctrl + 1 Single-space lines
  204. Ctrl + 2 Double-space lines
  205. Ctrl + 5 1.5-line spacing
  206. Ctrl + Alt + 1 Change text to heading 1
  207. Ctrl + Alt + 2 Change text to heading 2
  208. Ctrl + Alt + 3 Change text to heading 3
  209. F1 Open help
  210. Shift + F3 Change case of selected text
  211. Shift + Insert Paste
  212. F4 Repeat last action performed (Word 2000+)
  213. F7 Spell check selected text and/or document
  214. Shift + F7 Activate the thesaurus
  215. F12 Save as
  216. Ctrl + S Save
  217. Shift + F12 Save
  218. Alt + Shift + D Insert the current date
  219. Alt + Shift + T Insert the current time

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