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Types of Networks: LAN, WAN, WLAN, MAN, SAN, PAN, EPN & VPN.

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there are several different types of computer networks. Computer networks can be characterized by their size as well as their purpose. The size of a network can be expressed by the geographic area they occupy and the number of computers that are part of the network. Networks can cover anything from a handful of devices within a single room to millions of devices spread across the entire globe. Some of the different networks based on size are: Personal area network, or PAN Local area network, or LAN Metropolitan area network, or MAN Wide area network, or WAN One way to categorize the different types of computer network designs is by their scope or scale. For historical reasons, the networking industry refers to nearly every type of design as some kind of  area network . Common types of area networks are: LAN -  Local Area Network WAN - Wide Area Network WLAN -  Wireless Local Area Network MAN - M...
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Few More Shortcut keys in MS Excel..

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Shortcut Description F2 Edit the selected cell F3 After a name has been created, F3 will paste names. F4 Repeat last action. For example, if you changed the color of text in another cell, pressing F4 will change the text in cell to the same color. F5 Go to a specific cell. For example, C6. F7 Spell check selected text or document. F11 Create chart from selected data. Ctrl+Shift+; Enter the current time. Ctrl+; Enter the current date. Alt+Shift+F1 Insert New Worksheet. Alt+Enter While typing text in a cell, pressing Alt+Enter will move to the next line, allowing for multiple lines of text in one cell. Shift+F3 Open the Excel formula window. Shift+F5 Bring up search bo...
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WHY IS LISP NOT MORE POPULAR?

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LISP is a risky choice  for senior management. If things go wrong, no one is going to blame management for picking a popular object oriented language backed by a major corporation like Oracle or Microsoft. Its much easier to hire programmers with experience in popular, easy to learn languages. Even progressive companies willing to use a more powerful language usually don't choose LISP. This is because many of the newer languages try and compromise by borrowing powerful features from LISP, while staying easy to learn for the masses. Scala and Ruby follow this model. Bad programmers can pick them up quickly and keep writing the same mediocre code that they did in Java. Good programmers can take advantage of the more advanced features to write beautiful code. Parentheses are not the problem.  Haskell is an incredibly powerful and expressive language with a syntax similar to Python or Ruby and it hasn't been widely adopted for many of the same reasons as LISP.
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