Solar Generator Circuit

AC vs DC power outlets in canada?
I just got a Solar Power generator thing and it has two AC (alternating current) outlets and one DC (direct current) outlet. This much I understand. What I don’t understand is can I plug in anything (like a laptop, heater, battery charger) to the DC outlet or will it short circuit something? I don’t want to fry my stuff or start a fire, but I don’t know why a DC outlet would be on my generator if I can’t use it.
DC is mainly for smaller things like motors in toys and such, and all outlets, from what I know, are AC. That’s where the 50/60 Hz comes from, that shows how many times a second the charge alternates, hence, alternating current.
AC is used for pretty much all wall-plugged things, and I’m not sure if DC will damage them, but they might not function as properly.
For example, such things as pocket guitar amps, and keyboards (musical) can use transformers to provide them their 7.5 or 9 Volts and it would be DC, just like the batteries they would have used.
Other than that, you might want to read the manual for your Solar Panel, and see what that DC outlet might be for….