Where is the SPI library?

I just installed the arduino development environment V 1.6.10. Where is the SPI library. I read on the Arduino website it should be included in the standard library but it is not there. Any ideas?? Thanks

Some libraries are here:

arduino-1.6.10/libraries

And some libraries are here:

arduino-1.6.10/hardware/arduino/avr/libraries

The SPI is here:

arduino-1.6.10/hardware/arduino/avr/libraries/SPI/src

You can find them online in the same location:
https://github.com/arduino/Arduino/tree/master/hardware/arduino/avr/libraries/SPI/src