Transistor Uses

[MattAnonymous]

I have many of the following and was wondering what I could use them for.

C945P
9014-C8YC
8550
8099
C1815
MJE13005
MJE305
STPS15

[Hal]

you can find datasheets for most transistors by searching for the part number and the word "datasheet" in google...

these part numbers don't really ring a bell for me, but odds are you can find some use for them.

[Zero the hero]

C945P should be a 2SC945 general purpose transistor. It's NPN and it's like a BC547B or more like a 2N2222.
C1815 should be a 2SC1815 another general purpose NPN transitor with ECB pinout.
They both come from Japan.
MJE13005 is a Motorola NPN transistor with pinout BCE: 400V, 8A, 75W with gain running from 10 to 60. I suppose is used in swithching power supply. I don't know how you can use it in audio applications. Any ideas?
No usable information for the MJE305: silicon NPN trans, equivalent to 2N3055 and BDX10.
Nothing for the other trans.