Common Collecter Voltage

It's just an irritating name.
Most electronic designers I've met just call it plus and minus or positive rail, ground, or something like that. All this Vdd Vcc is a pain in the backside, as it makes little sense if you have mixed semiconductors technologies and configurations in a circuit.
Del

It may be irritating but its essential when selecting a transister for a design, you have to look at the specifications.

These will list Vcc, Vce, Vcb etc... showing the maximum allowable and breakdown values between the terminals designated by the sub text letters, c (collector), e (emitter), b (base), d (drain), etc...

That's why these values are always specified as Vcc or Vce or Vdd, Vds etc....

and very necessary they are when designing these components (transistors, FET's, diodes, etc...) into a circuit.

Ah yes indeed...but the questioner's subscipts were the same e.g vcc not Vce(max) and suchlike...
Oh I'm just being picky now..
I shall go and hide in one of my less secret cat nests (it's behind the curtains if anyone wants me)
Del

Yeah point taken..... but if a schematic is copied badly and the second subscript letter is missing, then Vc could be anything...

In fact some specs show one terminal is open circuit for the test by showing it as a o i.e Vceo > shows the voltage test is between the collector and emitter with the base open circuit...

As for the power supplies being called Vcc or Vdd etc... I think that is daft!!!

At Marconi's we were always told to show the voltage of the power supply rail and to distinguish between analogue ground and digital earth etc...

Afterall if you have a supply of several voltages using Vcc is meaningless.... just +3V3, +5V +12V is all that's needed....

You'd better come out now, the curtains will be drawn soon.....

Lets not confuse the issue with component specification terminology.(Veco) The question was about Vcc and Vee. Yes, it is daft. It is a convention that has stuck where it shouldn't have. In many cases there are several Vcc's and Vee's on one schematic. I try not to use Vcc and the like on a schematic. If one moves from one schematic to another you may encounter a Vcc that is not the same one as stated on the previous example and when you mix a FET and a Bi-polar transistor, it loses meaning. This is the official explanation: (plagiarized)

What is Vcc Vdd Vee Vss? Vcc and Vdd are the Positive voltages
Vcc - Positive supply voltage of a Bipolar Junction Transistor
Vdd - Positive supply voltage of a Field Effect Transistor

Vee and Vss are the Negative voltages/ground.
Vee - Negative supply voltage of a Bipolar Junction Transistor
Vss - Negative supply voltage of A Field Effect Transistor

The letters c, d, e and s originated from the name of the legs of the transistors Collector, Drain, Emitter and Source, respectively.

Why double suffix instead of single i.e. Why Vss instead of Vs?

The doubled suffix indicates that the voltage is "common", i.e. it is the supply voltage to one or more collectors (in the case of cc) and not just the voltage at a specific collector. Similarly, Vee is a common voltage for all emitters etc.

This is quite obsolete, but still used.

thanks mr. Electroman