The tilda ~ here is important; no one wants to buy an expansion card intended for their computer, especially if it is a vital circumstance, and it does not work, the expansion card you just overnighted was for phone systems, and vice versa; open the box, try to hook your business phone system up a few minutes before the big conference, and all the business people waiting outside the conference room, have to stand outside a bit longer, then a lot longer, then no conference, no deal..., the exp...
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Security systems in the old fashioned meaning of the word, a system of security to keep us and your equipment safe, such as from someone physically breaking in to your building and stealing your equipment.  Newer meaning of the term, security, especially in the context of computers, often means, security from someone or something hacking into your computer, stealing passwords, and electronic activity of that nature, which can be done from almost anywhere.

The old fashioned meaning of security ...
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