So I decided to do some "research" to fulfill my curiosities and the information I got from the Wikipedia are:
7-Eleven is an international franchisor, licensor, and operator of a chain of convenience stores. The company was founded in 1927 in Oak Cliff, Texas, USA, which is now part of Dallas, Texas, when an employee of Southland Ice Company started selling milk, eggs and bread from an ice dock. The original location was an improvised storefront at Southland Ice Company, an ice-manufacturing plant. Although small grocery stores and general merchandisers were present in the immediate area, the managers of the ice plant discovered that selling "convenience items" such as bread and milk was popular. Eventually, several locations would open up in the Dallas area. Initially, these stores were open from 7 a.m. to 11 p.m., hours unprecedented in their length, hence the name. The company began to use the 7-Eleven name in 1946.
Malaysian 7-Elevens are owned by Convenience Shopping Sdn. Bhd. (CSSB). Convenience Shopping Sdn Bhd (CCSB) was incorporated on 4 June 1984. CSSB is the pioneer of 24-hour convenience stores in Malaysia via its franchise of 7-Eleven stores in Malaysia.