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      How SMS Works by: Jim Sherman 
       SMS, or Short Message Service, is the technology behind what we often 
      refer to as ‘text messages' or ‘SMSes', as well as what allows for news 
      alerts on cellular phones. In recent years SMS has ballooned to over a 50 
      billion dollar industry and is quickly taking the communications world by 
      storm.  Short Message Service actually refers to a framework that uniquely 
      allows computers, or in this case phones, to communicate with each other 
      without the need of a central hub. With SMS, phones can find each other, 
      send short packets of information back and forth, and do it all without 
      any central computer to guide them. But because the system does not rely 
      upon fixed lines like a land based telephone system does, the amount of 
      information that can be sent at one time is limited in size. This depends 
      on the language spoken, but for English letters this typically means 
      around 150 characters (Chinese and Japanese letters are limited to 70).
       Quite recently, however, new developments in the technology have 
      allowed for even longer messages to be sent. Long or Concatenated SMS is a 
      development that allows multiple messages to be combined to form a single 
      message. In effect, what happens is that your phone actually sends out a 
      few smaller messages and then the receiving phone simply compiles those 
      messages so that for users on both ends, it appears as though the message 
      were cohesive. While there are some limitations, the brilliance behind SMS 
      is that because there is no need for central hubs, and thus the system can 
      be expanded indefinitely without any concerns of it slowing down or 
      becoming more expensive.  The most common form of SMS is ‘texting'. This usually takes place with 
      a cellular phone in which individuals use the letters behind the number 
      pad on their phone to spell out words and phrases and then send them out. 
      Because many companies charge by the word, individuals have come up with a 
      sort of ‘texting slang' to cut down on the amount of words required to 
      convey a particular message. For example, ‘gr8' and ‘BTW' mean ‘great' and 
      ‘by the way'. In addition, other words have just been shortened, such as 
      ‘lata' to mean ‘later'. Most users simply pick up the lingo through 
      frequent use, and although some slang is widely understood and used, other 
      shortcuts are developed within circles of friends and family.  The major advantage of SMS is its price. The price is typically $0.05 
      per message, a significant cut below that of traditional telephony and 
      cell phone per-minute charges. The savings of SMS has its roots in the 
      nature of the technology. Short Message Service, like SIP, is modeled on a 
      peer to peer model and not a cog and wheel like traditional communication 
      systems. This means that instead of having to route a message through a 
      central hub, your text goes straight from you to its destination. This has 
      radically cut down on the cost of SMS implementation and led to its 
      overwhelming popularity throughout the world.  Short Message Service (SMS) has radically changed the face of the 
      communications industry. While the practice has become quite common 
      throughout the world, it has only recently become popular here in the 
      United Stats, a growth partly predicated upon, surprisingly enough, its 
      featured role in the show American Idol. The fact that ‘texting' is 
      quickly gaining both in popularity and recognition in the United States is 
      not surprising however, due to its ability to offer users a cheap, quick, 
      and often fun way to communicate with friends and family.   | 
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