Distingusih between logical design and physical design of a system?
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In general, logical design would state *what* a system does and logical design would state *how* it is implemented.  For example, logical design may include entity relationship diagrams showing what data entities interact with each other.  Physical design would take the entity relationship diagram and describe the database tables that would be needed to implement that logical design.
915520
Discrete Hardware design is almost outdated in India. No money in it. Same is the case with systems maintenance etc. If you want to really build your career in electronics etc, join CG-Corel or CDAC VLSI courses. Do some live projects on Xylinx FPGAs etc.
198617
"Gates" are more correctly called logic gates. As the name implies, logic gates perform decision functions in digital electronics, especially in computers. This website has a complete discussion about logic gates, along with associated symbology -->http://www.play-hookey.com/digital/basic_gates.html
149299
The truth table is easy:\n\nABC . . . OUT\n000 . . . . 0\n001 . . . . 0\n010 . . . . 0\n011 . . . . 0\n100 . . . . 1\n101 . . . . 0\n110 . . . . 0\n111 . . . . 0\n\nConstructing the circuitry from logic gates would be a bit more work.
688656
There's a relation. Logic is a tool for made correct inferences. In that sense, if you have a true statement "perfect logic" will give you another true statement. However, there isn't any perfect logic, and more important: We don't know if the first statement is true, and logic cannot do anything to know it!!
655567
the first link explains system boundary and the second is an explanation of computer simulations in the context of "conceptualizing a system".  hope this helps
585531
Designing a computer is one thing, calculating is another.\n\nAt the beginning, there was the brain. Then the tools. then blah blah blah came the first calculator. It was crap and slow. To make a long story short humans have become pretty decent computer/chips designers by focusing on making them as fast as possible.\n\nBecause they are manufactured according to well-known laws and scalable processes, It has been possible to multiply exponentially the "speed" of computers over the last few decades, but no one has figured out yet how to do the same with the brain. \n\nBrain best practices, if they exist, are difficult to document, share, improve and preserve (it takes years to learn how to meditate properly, for instance, and when ). Chip/Computer/Software development, on the other hand, can regularly and consistently be improved upon.
52983
Most search engines follow the rules and symbols for Boolean logic.  If you spend anytime using search engines you might find the following article very informative.
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http://computer.howstuffworks.com/boolean.htm check this site out.
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A discrete system takes on specific values that can be broken down into parts.  A continuous system has no gaps.\n\nExample: Discrete system would be something that takes on integer values, while continuous would be the real numbers.
545355
A general rule of thumb I have heard in engineering is "the fewer moving parts the more reliable" (another conflicting rule is "if it ain't broke, it doesn't have enough features yet").\n\nI would say it depends on the application.  I know hard-drives inside computers or MP3 players are very sensitive mechanical components.  Then again, electrical hardware is prone to overheating.
110994
A block diagram shows the basic functions of a system or circuit and which subsystems perform which functions.\nA system diagram shows the general wiring without showing subsystem details, sometimes showing the physical locations of parts.\nA circuit diagram shows detailed connections between all basic components.\nA wiring diagram shows wire markings and labels, and how wires are physically connected to subsystems or external systems.
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and or and not are logical functions but moreover they are gates not switches. Microcontrollers are made of thousands of transistors (sometimes referred to as switches.) as they are configured to create logical units and buffers. \n\nHowever to correct the author of the question, it is not a matter of switch type (transistor, such as HMOS, CMOS, NMOS for example) But more than that, one kind of switch could you not use to create a "CPU" and the answer to that is it depends on how slow  or fast it has to be. We could create one made up of Bi-polar Transistors it would be huge and very hot in comparison , however it can be done and has been. How do you think we got them to size and speed they are today..
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Try starting here:\nhttp://computer.howstuffworks.com/boolean.htm
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Easy to use, logical, does what it is supposed to, and doesn't cause problems that it is not intended to.  It would also be nice for it to be aesthetically pleasing.\n\nThis is a very generic description, but then yours is a very general question.
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Physical Science or Physics
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It depends on how esoteric you want to get.\n\nSoftware is nothing but energy on the hard drive, magnetic impulses. That's not physical. But if you talk about burning software on a CD-ROM, then the software becomes physical changes on the cd-rom surface. That's physical.\n\nI would have to say, given the choices, most of the time its Logical.