1. Y/C (Luminance/Chrominance)

2. Y:Cb:Cr

3. Y:Pb:Pr

4. yacc (Yet Another Compiler Compiler)

5. Yahoo!

6. YDKM (You Don’t Know Me)

7. Yellow Dog Linux

8. yEnc

9. YGBSM (You gotta be s***tin’ me!)

10. YIQ (Luminance In-phase Quadrature-phase)

11. Ymodem

12. Yonah

13. YTTT (You Telling The Truth)

14. YUV