a PC is a computer. and yes it works on a PC.
You can have video chats cross-platform if you use software like Skype on both computers or AIM on the PC and iChat on the Mac.
Yes, this scanner will work both with pc's and mac computers.
Yes it will work on all PC's but will not be compatible with Mac computers.
Yes, Skype offers PC to phone services for a small fee. Their PC to PC services are free however. This and other information can be found at their website.
With Skype
Routers do not require presence of other computers to work. You can have even a single router in your network with no computers connected and will still work.
Using the software Skype you can dial phones from your PC. Skype is a free software but does require a fee to dial phones.
To make a video call requires Skype (the latest version is usually the best) running on a speedy broadband connection at both ends of the call. Older Macs with G4 or G5 processors will struggle to keep up with video calling. Without full details of connection speeds and the computers involved it is impossible to say why it may not be working.
yes all computers can
Ou do something
No,it does not, at least not on my PC
Yes it will! As Skype History is stored locally on your Computer!