People need food and medicine on daily basis. Computers, you buy them every 5 years or so. A computer can serve you more than 5 years. Food and medicine, you can only use them once, and run out of them very quick. In a sense, using the computer is a "service", not a commodity. Not all Gazans have money to buy a computer, they usually use it at their universities, schools (for free), or at an Internet cafe (2 shekels an hour or so). Btw, they could have bought the computer a long time before the blockade, or they might have got it from the underground tunnels. And yes, they are suffering. Their basic human rights is denied.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Gaza, the most Facebook friendly place on earth