Explanation

A computer is a complex system; contemporary computers contain millions of elementary electronic components.

Explanation

A Parallel Adder is a digital circuit capable of finding the arithmetic sum of two binary numbers that is greater than one bit in length by operating on corresponding pairs of bits in parallel.

Explanation

For point to point analog signaling, a bandwidth of up to about  1 MHz is possible.

Analog bandwidth is the maximum sinusoidal frequency of the analog signal the circuit works with. 

Explanation

Active Voice: Shall we have completed our task?

Passive Voice: Shall our task have been completed by us.

This sentence belongs to Future tense. 

Explanation

Long-haul, terrestrial optical fiber networks connect cities and countries throughout the world.

Explanation

Input and Output are used as a medium of communication between the external environment and the CPU. 

Explanation

The true potential of optical fiber is fully exploited when multiple beams of light at different frequencies are transmitted on the same fiber. 

Explanation

The designers of the Multics system were the first to use the term process to describe a program in execution in the context of operating systems. 

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Explanation

Direct speech: He said, "I am feeling sad today,". 

Indirect speech: He said that he was feeling sad that day.

Remover inverted commas.

Change today into that day.

Add that.

Change present tense into past tense.

Explanation

Parts from four early computers, 1962. From left to right: ENIAC board, EDVAC board, ORDVAC board, and BRLESC-I board, showing the trend toward miniaturization. The first aids to computation were purely mechanical devices which required the operator to set up the initial values of an elementary arithmetic operation, then manipulate the device to obtain the result. Later, computers represented numbers in a continuous form (e.g. distance along a scale, rotation of a shaft, or a voltage). Numbers could also be represented in the form of digits, automatically manipulated by a mechanism. Although this approach generally required more complex mechanisms, it greatly increased the precision of results. The development of transistor technology and then the integrated circuit chip led to a series of breakthroughs, starting with transistor computers and then integrated circuit computers, causing digital computers to largely replace analog computers. Metal-oxide-semiconductor (MOS) large-scale integration (LSI) then enabled semiconductor memory and the microprocessor, leading to another key breakthrough, the miniaturized personal computer (PC), in the 1970s. The cost of computers gradually became so low that personal computers by the 1990s, and then mobile computers (smartphones and tablets) in the 2000s, became ubiquitous