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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 examples of area network types are: LAN - Local Area Network WLAN - Wireless Local Area Network WAN - Wide Area Network MAN - Metropolitan Area Network SAN - Storage Area Network, System Area Network, Server Area Network, or sometimes Small Area Network CAN - Campus Area Network, Controller Area Network, or sometimes Cluster Area Network PAN - Personal Area Network DAN - Desk Area Network LAN and WAN were the original categories of area networks, while the others have gradually emerged over many years of technology evolution.
Update : Visit the 2012 version of The 20 Best Travel Websites on the Internet I hope that everyone who attended my SXSW Core Conversation panel on How to Make Money Traveling Around the World enjoyed the presentation. As promised, I have a listing of my top 20 favorite travel websites (in no particular order).
Version 1 (below) appeared in the Seattle Sunday Star on Oct. 29, 1887, in a column by Dr. Henry A. Smith.
digg On March 10, 1869, railroad officials, political leaders and work gangs converged at Promontory Point, Utah, to drive in the last spike of the Pacific Railroad, the first of five transcontinental railroads built in the 19th century. The driving of the spike linked the Union Pacific line built from East to West with the Central Pacific, which had commenced construction in California. On January 28, 1986, after about 73 seconds into its launch, space shuttle Challenger exploded, leading to the deaths of its seven crew members, which included the first teacher in space.
National Geographic is currently holding its annual photo contest , with the deadline for submissions coming up on November 30. For the past nine weeks, the society has been gathering and presenting galleries of submissions, encouraging readers to vote for them as well. National Geographic was kind enough to let me choose among its entries from 2011 for display here on In Focus.
For a number of reasons, natural and human, people have recently evacuated or otherwise abandoned a number of places around the world -- large and small, old and new. Gathering images of deserted areas into a single photo essay, one can get a sense of what the world might look like if humans were to vanish from the planet altogether. Collected here are recent scenes from nuclear-exclusion zones, blighted urban neighborhoods, towns where residents left to escape violence, unsold developments built during the real estate boom, ghost towns, and more. [ 41 photos ] Use j/k keys or ←/→ to navigate Choose: A tree grows from the top of a chimney in an abandoned factory yard in Luque, on the outskirts of Asuncion, Paraguay, on October 2 , 2011. <div><a href="http://pubads.g.doubleclick.net/gampad/jump?
There is a beauty that lies underneath the icy Tianuksa River in Leningradskaya Oblast, Russia. An otherworldly cavern of layered ice and glistening crystalline forming under the surface of the river. This phenomenon of a place was discovered by 55-year-old Russian photographer Yuri Ovchinnikov and his son completely by accident.
If you've gone on more than one job interview, you know you can count on hearing many of the same questions at each. Make sure you've got these 10 answers down pat before you head out the door to your next interview. Photo by Aidan Jones .
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In UK and US English, the apostrophe is used: To indicate the possessive. To indicate missing letters. Sometimes to indicate the structure of unusual words. 1.
The Problem of Space Travel: The Rocket Motor Editorial Comment : This electronic text of The Problem of Space Travel is a rough version that omits numerous illustrations and other items that are included in the published volume. The text for the figures is included in this electronic version so that readers can see where illustrations are supposed to be inserted. A paperback edition of this book, including all illustrations, charts, and figures, can be purchased for $11.00, including postage, from the Government Printing Office.
Recently, someone asked Reddit for a list of the best science fiction books of all time. Being a fan of sci-fi, and wanting to expand my own reading list, I thought it would be helpful to tally the results and preserve them here for future reference. I've also included selected quotes from the comments, as well as my own notes on the books I've already read. PS: All book images in this post are copyright Amazon, and were retrieved using my Big Book Search Engine . So, without further ado, here are the Greatest Sci-Fi Books of All Time, ordered by upvote count: Dune