This is really only a function of "DVD" players. However ONE unit that actually holds 10 Discs in their spots at a time in memory (but is a single disc player) is a fairly hi end unit called the OPPO BDP 83. It will auto hold CD, DVD, Blu Ray, SACD etc...And resume play everytime from the last spot you left it unless you hit the stop Button 2 times vs. only once.
It is a Universal machine meaning it plays anything, and also is the highest rated player on the market at a 500 dollar price point as well. It sounds very good in stock form, there is an "Audiophile" special edition now available for about 800 I believe. If you have not read about this unit it is everywhere on this site and others, pro and amature reviews always highly favoring it to much more expensive counterparts.