Adobe founded in 1982 and as from then is one of the leading companies in software. Only Adobe gives everyone — from emerging artists to global brands — everything they need to design and deliver exceptional digital experiences. With headquarters at San Jose, California, USA and with more than 14,000 worldwide, Adobe is one of largests software companies in the world. They are considering the creators of PDF format documents and this is the reason that the "original" PDF reader is the Adobe PDF.
Some of their popular products are: Adobe Acrobat (Free and paid versions), Adobe Photoshop, Adobe illustrator, Adobe Dreamweaver and many-many others.