Dvdrw Wifi Laptop

What kind of things should I look for in a laptop???
I dont know much about them.
1) What is better? Mac or PC?
2) Whats the diffence between DDR2 memory and hardrive?
3) Whats a Super Multi DVDRW with LightScribe? Whats the diffrence between a regular one and a Duel-Layer one?
4) Whats a 5-1 card reader? IIs it better then a 4-1?
5) Whats a 802.11 b/g WiFi?
6) What graphics would be the best? The bigger numbers the better right?
7) What is a 5-1 Media Adapter?
Thank You!!
1)A mac is better but there is less software.
You can run Windows on it if you need to.
2)A hard drive saves the data and RAM makes the computer work. More RAM makes programs run faster.
3)Lightscribe putes a picture of your choice on the front of the CD/DVD but you have to flip it and it is slow. A dual-layer one burns stuff on a dual-layer DVD and standard DVDs.
Regular will only burn Regular DVDs.
4)Yes, 5-1 means it can take more types of merory cards. Ex:SD,Memory Stick Pro Duo. Note:Not avaitable on Macbook and Macbook Pro.
5)It is a type of connection.
6)The more graphic memory, the better.
7)I already explained
Note:Lightscribe only in HP drives.
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