As more tenants and entertainment venues were added, SM City North EDSA then came to be known as the mall that institutionalized the "one-stop" shopping concept in the Philippines. It was the first to introduce "malling" as a pastime in the Philippines. A four-level carpark, also known as the Annex 1, was constructed in February 1988. The lower ground floor was converted into an enclosed retail space. Another level was also added on the main mall. On July 28, 1989, a two-floor annex, also known as the original "Annex 2", was built providing more leasable space, a bowling alley and four additional movie houses. The main building and the annexes were expanded with a lower ground level, and the first level of The Carpark Plaza was converted into Cyberzone, a section reserved mainly for technology and gadget retail.