If you reset something I would guess it wiped that data. I suspect after a bit of use [or reboot] then your apps will start re appearing
No, reboot is just turning off the device and restarting it. Reset clears all your info and resets your device like new out of the box. Did you go into settings and do a factory reset? Are your pictures still in the gallery? Music?
What?! ...I'm msndrstood.
via Gnex