the dp stands for double pointed. They are being used in sock patterns or where ever a small circle is required. They usually come in sets of 4 or 5. 3 or 4 are being used to form the circle and one is to knit with.
That is exactly what the initials stand for, well done Angie for informing killiecrankie. Love Chris
Thank you for the info.Its been awhile since I did any knitting ,so I am not up to date with some of the new abbreviations