Exponents  Giga Tera Pico Nano
In the Metric System you will encounter prefixes
for numbers. In electronics, right from resistors
to hard disks these units are used. So you have to
have in your memory, at least the ones below, so
that you place the correct value of cap or
inductor in your circuit.
Electronic Component Values like Ohm, Farad and
Metrics like Volts, Amps have prefixes like Giga
Ohm, Milli Amp, Pico Farad. Which indicates the
Order of Magnitude.
See SI
Units or
Metric Units to read more about these. R, C
and L values are given these prefixes. We have
resistors like 10 Tera Ohms of Glass Surface
Resistance to 1 Micro Ohms of a Small Copper Wire
Resistance. 1 Pico Farad of Capacitance of two
Large PCB Tracks in a Multi Layer PCB to 10 Milli
Farad of a Huge Electrolytic Power Supply Filter.
Then Lastly 10 Nano Henrys Inductance of the
Twisted Connector Cables in a Computer and 1 Henry
of a Powerful Choke that can kickback 10 Kilo
Volts when a 10 Amps current thru it is broken.
Electronics is Fun, is it not.
Exponents
Tera

1000,000,000,000

1.e ^{+12}

Giga

1000,000,000

1.e ^{+9}

Mega

1000,000

1.e ^{+6}

Kilo

1000

1.e ^{+3}

units

1

1.e ^{+0}

milli

1 /
1000 
1.e ^{3}

micro

1 /
1000,000 
1.e ^{6}

nano

1 /
1000,000,000 
1.e ^{9}

pico

1 /
1000,000,000,000 
1.e ^{12}

A metric prefix or SI prefix is a unit prefix that
precedes a basic unit of measure to indicate a
decadic multiple or fraction of the unit. Each
prefix has a unique symbol that is prepended to the
unit symbol. The prefix kilo, for example, may be
added to gram to indicate multiplication by one
thousand; one kilogram is equal to one thousand
grams. The prefix centi, likewise, may be added to
metre to indicate division by one hundred; one
centimetre is equal to one hundredth of a metre. Metric
prefix  Wiki
Just Google 0.1% or 1000/1e6 or 1000/1000000
....answer in the calculator that pops up is same.
Read " Parts Per
Million  PPM" as used in Resistors. 1000 ppm
is 0.1%.
Most MFR Resistors have a Temperature Coefficient of
100 ppm/°C. Read more at
Resistance  Ask The Applications Engineer.
100ppm is like 0.01%.
0.01% is close to the resolution of a 41/2 Digit
Voltmeter. 100.00 is the reading you will see for
100 Volts. Imagine the front end attenuator in that
voltmeter is Standard MFR and a "Hot" Voltage
Regulator is leaning on it, (you wanted to make your
pcb compact) The last digit will be Spinning
like a Ferris Wheel. Are we understanding
Instrumentation!
Read 
Accuracy, precision & resolution
Tera Ohm Resistors  That is a Big, Gigantic
Value.
Victoreen Tera Ohm Resistors now made by Ohmite.
Pico Farad Capacitors  This is a
Small, Tiny, Value
PicoFarad Ceramic Capacitors and a Variable Trimmer
Cap
More of Basic Electronics
