Noob - Output Question

[tazdevil]

I am seeing the following on my system (just learning, nothing professional)..

Speed.GPU.#1...: 43787 H/s
Speed.GPU.#2...: 43581 H/s
Speed.GPU.#*...: 87368 H/s

I see posts like;

Speed.GPU.#1...: 4348.1 kH/s
Speed.GPU.#2...: 4356.3 kH/s
Speed.GPU.#*...: 8704.4 kH/s

noob question, what does the H/s and kH/s stand for? I am assuming kH/s is better than H/s?