#Computer Important Points

• First generation is used valve technology
• I.C  is used in third generation
• First computer is known as ABACUS
• First electronic computer ENIAC
• First digital computer UNIVAC
• 1024 MB is equal to 1GB.
• Bits stand for binary digits
• 8bits is equal to 1 byte
• Mother is known as mainboard
• G2E stand for government to employees.
• Multimedia is combination of various media
• Complier and interpreter is used in HLL
• CU ,  A.L.U and registers port of the C.P.U.
• C.P.U  is known as computer brain
• Ram is volatile memory
• Bios stand for basic input output system
• CMOS stands for complementary metal oxide semiconductor.
• GUI stand for graphical user interface
• FORMAT is Dos external command .
• Linux is introduce in 1991
• Linux is free of cost(some versions)
• Linux symbol is penguin bird
• NT stands for New technology
• Os works as an intermediary between computer  h/w  and user
• Booting is the process of system start up
• Warm booting short key is (ctrl+alt+del)
• You can create many folder on deskpot as you want
• You can open simultenously more than one file.
• First graphical os was mac( macintosh).
• Dos has two type of commands internal and external.
• .bat is an extension of Dos file.
• Ray tomilson is an inventor of e- mail.
• First e-mail was sent in 1971.
• First message was qwertyuiop.
• Wi-fi stands for wireless fidelity.
• Powerpoint page is called slide
• HUB is used for connecting multiple computers
• Ping stand for packet internet gopher.
• www inventor name is tim berner lee
• HUB or switch is used as central device in  toplogy
• FTP is used for uploading.
• SMTP is used for sending mail.
• Pop3 is used for receiving mail.
• Ncsa mosaic is known as first graphical brower.
• Lynx is a textual brewer.
• Drop cap by default takes 3 lines
• Tab setting is by default 0.5”.
• Clipart is found in  “INSERT TAB “.
• .xls is an extension of microsoft excel.
• .ptx is an extension of PowerPoint template extension
• .xlt is an extension of excel template.
• .dot is an extension of Microsoft word template.
• F1 is used for help.
• F4 is used for repeat.
• F7 is used for spelling and grammar.
• F5 is used for go to in ms word.
• F5 is used for slide show in power point.
• Ctrl+D is used for duplicate slide in powerpoint.
• APRANET was found in1969
• First computer network was ARPANET.
• Internet is earlier known as NFSNET
• NFS NET(national science foundation network)
• HTTPS stands for hyper text transfer protocol secure.
• .htm is an extension of HTML.
• GPS stand for global positioning system.
• NIC stand for network interface connection card.
• Proxy is known as server (intermediay)
• 127.0.0.1 is loopback IP address.
• =rondup(3.271) enter= 3.3
• First electronic worksheet was visicals.
• Powerpoint is product of Microsoft.
• Mac is used in apple computers.
• Intranet is type of network.
• CCTV stands for close circuit television.
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