What are the different ecological principles? Please explain each briefly?

Please explain basic principles of how a computer works?

• I did this at college 2 years ago, but would like to start researching about computers again as a hobby. Please can anyone explain how computers work, how do OS's work with the computer? And all about binary ect. and how software works with the processor etc. also things like BIOS. any information is really appreciated and please talk as though your talking to someone yuonger as i havent done this sort of IT for a while, so am abit confused about the basic principles of how a computer works. thanks very much

• Answer:

  A computer is a programmable machine designed to automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem. An important class of computer operations on some computing platforms is the accepting of input from human operators and the output of results formatted for human consumption. The interface between the computer and the human operator is known as the user interface. Conventionally a computer consists of some form of memory, at least one element that carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on the information that is stored. Peripheral devices allow information to be entered from an external source, and allow the results of operations to be sent out. A computer's processing unit executes series of instructions that make it read, manipulate and then store data. Conditional instructions change the sequence of instructions as a function of the current state of the machine or its environment.