Before revision:  In particular this entails closed form solutions for joining the shortest or least loaded queue among d randomly selected queues with memory in case of exponential job sizes  .
After revision:  In particular this entails closed form solutions for joining the shortest or least loaded queue among d randomly selected queues with memory in case of exponential job sizes . Moreover, we obtain a simple closed form expression for the (scaled) expected waiting time as the system tends towards instability .