The Buy n Large Corporation, abbreviated the BnL Corp., is a conglomerate in the WALL•E universe.
Andrew Stanton, in a commentary on the WALL•E DVD, stated his inspirations for Buy n Large were large corporations and how some people let consumerism govern how they run their lives. He stated that the people at Pixar had always pictured WALL•E as "a trash compactor" when the idea for the movie was first discussed. He reversed-engineered the idea on why WALL•E was cleaning up the planet and why the Earth was covered in trash and the idea of what if a company was the government. And according to the commentary, one of the artists, Teddy Newton, came up with the term "Buy n Large Corporation". Stanton was intrigued by the term and he was able to truncate it to the acronym of BnL, which "tripped off the tongue real easily".

According to The History of Buy n Large, the corporation got its start as a maker of frozen yogurt. It was a small business called Buy Yogurt. Later on, the business eventually acquired Large Industries, a men's suit company in the Midwest during the 1960’s. Durning the time of A.I creation led by the late supervillain named Syndrome, A.I. expanded across the world making machines that would later on make the faceless corporation entity named Buy n' Large (note how there once was an apostrophe before the "n"). By the year 2057, as shown on the Buy n Large website, the conglomerate became a worldwide leader in the fields of aerospace, agriculture, construction, consumer goods, corporate grooming, earth transport, electronics, energy, engineering, finance, food services, fusion research, government, hydro-power, infrastructures, inventions, media, medical science, mortgage loans, pet care, pharmaceuticals, psychotherapies, ports and harbors, real estate, repairs, retail, robotics, science/health, space, storage, super centers, super grids, travel services, utilities, and watermills. The corporation's control affected other companies as well. It seemed as though other businesses wanted BnL to buy them out, such as Headr Inc. which gave BnL control of the world news headlines.
Buy n Large continued to expand its efforts for control so much that by the year 2105, Buy n Large had over two million wholly owned subsidiaries, governmental bodies, and health care centers. It had finally become a world leader in every conceivable field including world leadership. The Buy n Large Corporation's control over world governments was overseen by a global CEO, at the time it was Shelby Forthright. There was also a board of directors that approved Operation Cleanup. By giving the entire population on Earth (it was over 200 billion as seen in a newspaper) "the right to spend", humanity went into a state of mass consumerism which covered the entire planet in un-recycled refuse. By the time the movie WALL•E takes place, Buy n Large had built the Axiom, an executive starliner (among thousands of others whose names have not been disclosed), as a temporary refuge outside Earth while millions of WALL•E units and smaller number of huge mobile incinerators attempt to clean up the planet. Originally its cruise was only to be five years long until the BnL CEO proclaimed Earth unable to support life due to extreme toxicity. The Axiom and the rest of the starliners had to remain in space due to Directive A-113. After Buy n Large officially abandoned Earth in 2110, Shelby Forthright and all other humans supervising the cleanup had everything shut down and left. By the time the story in WALL•E takes place, Buy and Large only lives on through technically on the Axiom, and presumably all the other starliners, but since the death of Shelby Forthright and his generation, it no longer truly exists in a corporate sense. All Buy n Large activity on the Axiom is the same as it was 700 years before. It still has the same advertisements, but the corporation is just run on a defunct, - it being carried on only by the robots and automated systems of the starliner. Babies are taught how Buy n Large is their "very best friend", there are BnL logos on everything, and there are still automated announcements about Buy n Large. All the holographic advertisements still tell people to consume and shop, but humans no longer consume as there are no actual products to buy, let alone money to use. It is unknown if the humans know what Buy n Large did in history or whether Buy and Large leadership exists anymore.