Well the first part of your question is easy. an ISP(internet service provider) is who sells access to the internet for a monthly cost. There's no way to list them all since I'm sure there are hundreds of ISPs in the US. An easy way to tell you provides in your area would be to pull out the yellow pages and look under "Internet".
Now the second part of the question isn't quite clear. If you're wonder what type of computers systems ISPs run to give you access then they are simply servers.
There is no such company called Tiger computers. There is, however a website called Tiger Direct that sells computers. You can purchase any brand of computer from Tiger Direct. You can also purchase some computer peripherals.
Apple sells more computers in the USA than any other company.
A computer shop - sells hardware (computers, mice etc) and software (games, windows etc). An internet cafe - is a place that provides access to the internet via their own machines for a small fee.
Dell sells computers over the Internet and have them delivered to your door, they can customize the PC to your needs (probably costs more) but it can be worth it.
One of the products that The Source, formerly called Circuit City, sells is computers. Another product that the store sells is surge protectors for electrical outlets.
Amazon really sells computers that are cheap. Sometimes you just have to be looking online at the right times amazon sells computers that are cheap and sometimes you can get a Sonya or others brands that are good prices.
A Company That Sells Cookies And Fixes Computers
a person who sells computers
Some examples of eBusinesses are the famous iTunes which sells music over the Internet and Amazon which sells apparels over the Internet.
A man who sells men's clothing is called a haberdasher and the store is called a haberdashery.
Yes, Argos sells laptops and also computers
A computer store is a store that sells computers, or computer parts.