The first versions of the C language and Unix operating system were produced on DEC PDP computers, which were the first commercially viable minicomputer?s. DEC also produced the popular VAX line, the Alpha (AXP) microprocessor (the first commercially available 64-bit microprocessor), and some commercially unsuccessful personal computers including the DEC One, the first laptop? computer and the first MS-DOS computer to use the now standard 3 1/2" floppy disks. DEC was the first commercial business connected to the Internet, "digital.com" being the first of the now ubiquitous ".com" domains. The popular [AltaVista], created by DEC, was the first comprehensive Internet search engine.