Despite having several stores, the Av. Central Bui...

Despite having several stores, the Av. Central Building is in demand and known for its computer and gadget stores. In this area you will find almost everything there.
It is literally on top of the Carioca subway station, there is no mistake getting there.
Finally, a tip, check the prices in the "Good tip" before you go, there is an exclusive discount for the site (but only for cash payment)