A laptop if you want a complete computer that you can carry around (there is a CPU in a laptop)
A CPU if you have a computer and want to upgrade or replace the "Central Processing Unit" which is the most expensive and complicated component.
you should buy the ipad and cheap laptop.
Dell laptop
One can buy a cheap laptop either used or new. If it is used, it is probably best to assume that one year of good service would be the norm, unless the laptop was just recently bought. For a new cheap laptop, expect to pay around $500. But don't expect to get a "core" CPU, one that operates as two or more CPUs. Core CPU laptops cost over $500. A budget, cheap laptop should cost $400 or less. It should have wireless and Ethernet modems and at least a good 100GB or 200GB hard drive.
The cheapest laptop that you would buy to run Steam games would be a Samsung Rc512-S02 laptop.
You should bye a apple laptop.
Intel Atom
The CPU of a laptop is the central processing unit that is basically the heart of your laptop and can perform various applications on how powerful it can be, it is a chip on your laptop motherboard that is removable or sometimes integrated. EX. a 2ghz is much weaker compared to a 4ghz cpu. Without the CPU your laptop is a piece of junk because it will not turn on. A CPU can be optimized for basic tasks such as word documents to extreme gaming. Personally fo you are looking forward to buying a computer go with a higher end CPU as long as it fits your budget because a low end CPU will frustrate you especially if you are a gamer. You will know if you found a CPU is it says Intel or AMD.
PS3
You should buy a bag that is made to fit your laptop for the best protection. Or you can get the size up. Usually the seller specify the size of the laptop that you can carry with that kind of bag!
You should look for a laptop bag which holds your laptop snugly with padding. It should also have room for your charging cords and pockets for other storage.
You can probably download phone apps to a standard laptop, but they won't be able to run because the laptop CPU and OS are incompatible with the smartphone CPU and OS that the apps were coded for. But if you had them on the laptop and then downloaded them from the laptop to the smartphone, they would run on the smartphone.
hp laptop 2009