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59 Cards in this Set
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 Back
What is the origin of the term digit

it came from the use of the fingers because we have ten digits

List the mathematical functions that can be performed on the ancient abacus

add
subtract divide multiply square roots cubic roots 
the first adding machine was invented by _ in the seventeenth century

Blaise Pascal

Joseph Jacquard invented a loom that used _ techniques and _ cards to weave patterns in the cloth

Digital / Punched

Many of the principles used in the modern computer can be traced to _ who developed the idea of mechanical digital computer in the 1830s

Charles Babbage

Briefly describe the difference between a calculator and a computer

computer has programs and data so it doesn't require human intervention
Calculator requires human intervention in order to work 
What was George Boole's major contribution to the modern computer
1815  1864 
the book Law of Thought was the first systematic treatment of the use of logic

Who designed and built the first analog computer

Vannevar Bush

Who developed the first digital computer to use both electrical and mechanical devices? when?

Howard Aiken / 1944

who invented the slide rule known as bones or rods

John Napier

one of the first commercially available computers was the _ which was introduced in 1951

UNIVAC I

the _ was developed at bell laboratories in 1947 and was used as a replacement for the vacuum tube in the computer

Transistors

define bit and byte

bit 1 or 0
byte 8 bits 
early disk operating system DOS by Microsoft limited the main memory of a computer to

640 kilobytes

what is meant by random access memory RAM

all storage locations in the memory are equally accessible, sequential access is not required

hard and floppy disks are referred to as _ memory

auxiliary

the system that allows data to be entered and allows the computer to communicate with the outside world BIOS is contained in _ memory

read only

what is the purpose of cache memory

to compensate for mismatch in operating speeds between the processor and main memory access time

what is meant by virtual memory

a method of using auxiliary to increase the main memory

when the processor and the control units of a computer are combined into a single unit, the unit is known as the

CPU

switches X and Y are connected in series with each other to provide a function F. write three forms of Boolean Algebra equations that will express this relationship

X * Y = F multiply

switches X and Y are connected in parallel with each other to provide a function F. write three forms of Boolean Algebra equations that will express this relationship

X + Y = F add

give two ways that the complement of switch X can be indicated

X with a line on top and X'

give the equivalent term for (F')'

= F

state in words what the boolean equation (WX = A) means

output A depends on W and X being high

how are operations grouped in Boolean Algebra

PEMDAS

write the Boolean Equation that will support the statement, the motor M will start if you reset the overload R and push the start button S

R * S = M

Either of the two switches A,B can be used to turn on a fan F. write the boolean equation that expresses this relationship

A + B = F

the AND gate is a logic circuit that has _ or more inputs and a _ output

2 / single

an AND gate has a LOW output. this means that at least _ input are _

1 / Low

draw the new and old symbols for an AND gate with three inputs A  C and an output F


_D output  _[ ]  & 
write the Boolean Algebra equation that expresses the circuit

ABC = F

the output F is HIGH in the truth table above for _ of the eight possible sets

one

draw the NEMA logic symbol for a 4  input AND gate


   [ ] & 
An IC integrated circuit chip with four AND gates is called a _ AND gate

Quad

the OR gate is a logic circuit that has _ or more inputs and a _ output

two / single

An OR gate has a LOW output. this means that at least _ inputs are _

all / low

what solid state device was introduced in the early 1960s that led directly to the development of the first microprocessor

IC integrated circuit

the acronym TTL stands for

Transistor Transistor Logic

the introduction of the TTL revolutionized the computer industry due to the _ of the chip

Low cost

with the introduction of the TTL design using mathematical design techniques was replaced by the concept of

redundancy

very large scale integration VLSI techniques make it possible for several _ transistors to be packaged in a single chip

million

the personal computer PC was introduced in the early

1980

the two categories of the study of electronics are _ and _

Digital + Analog

a graph showing continuous values over time is an _ representation

Analog

a graph showing the values at discrete time intervals is a _ representation

Digital

Explain how AND logic can be changed to NAND logic

by inverting weither input to the AND gate or by inverting the output

When AND logic is followed by an _, the output is NAND logic.

inverter

with AND logic, the output will be _ if _ of the inputs are HIGH

HIGH / All

in a NOR logic gate, what is the purpose of the common  emitter amplifier following the OR logic

to buffer the gate from other gates and the load

how did the term NOR come about

is the contraction of not/or

write four possible Boolean equations that express the input to output logic

A + B = X'
A' + B = X' A + B' = X' A' + B' = X 
the amplifier used for buffering in a NOR gate is called an

Inverter

What does the bubble on the NOR symbol indicate

provided at the output

the output of the XOR gate is High when _ input is High

ONE

if only one of the inputs is Low, the output will be _

High

how is an XOR gate identified from an AND gate when the new symbol is used

AND gate has an & symbol
XOR gate has an = 1 symbol 
the maximum number of inputs to an XNOR gate is _

2

How is the symbol for XNOR gate different from the XOR gate

bubble is used
