A list of options available on a website has which name?

I feel that the world is overly reliant on computer. Once l tried to purchase a pack of chewing gum for 50 cents, but was unable to get the gum because the computers were down.Why can’t there be a side by side paper backup to take us through computer system failures? Then Cyberwars would be less of a threat.

I got the answer right but I'd still say the wording of the question is very confusing. A good question always states it's query clearly.