Viruses and evil hackers who want information from you and the government . The most biggest threat is negligence about security from the user.
*Most "hackers" aren't evil, they are knowledgeable people who are looking for a way to expand and test their skills but do not have a proper outlet to do so. This leads to what looks like random, mean or senseless attacks on innocent people. Past this, the biggest security hole in computing is, indeed, the user. As the saying goes, "There is no patch for human stupidity".
About 20 billion people have computers, that's just in Africa! Imagine how many people in the world have computers if 20 billion people in Africa have them!
Client - server architecture allows physically distributed users access to a centralised resource. The client is a process (program) that sends a message to a server process (program), requesting that the server perform a task (service). A server process (program) fulfills the client request by performing the task requested. The architecture's advantages include flexibility, expandability and reduced communications costs in comparison to a two-tiered system in which the client must download data from the database. While client/server technology offers many benefits, moving to it can be expensive.
Basically you will have to reinstall the software all over again.
The computers are placed behind the radio and the heating systems. They are screwed to the floor of the car. HAPPY UNSCREWING!!!