The company's most well-known products are the Apple Macintosh line of personal computers, the iPod portable music player, and the iTunes media player.

Apple has been a major player in the evolution of personal computing since its founding in 1976. The Apple II microcomputer, introduced in 1977, was a hit with home users. In 1983, Apple introduced the Lisa, the first commercial personal computer to employ a graphical user interface, which was influenced in part by the Xerox Alto.

In 1984, the Macintosh (commonly called the "Mac") was introduced, furthering the concepts of a user-friendly graphical user interface, and also introducing the mouse for the first time in a personal computer. Apple's success with the Macintosh became a major influence in the development of graphical interfaces

In 1991, Apple introduced the PowerBook line of portable computers, establishing the modern ergonomic form and design that has since become ubiquitous in the portable market.

The first Macs were powered by Motorola's 32-bit 680x0 families of CPUs. In 1994, Apple introduced the PowerMacs, which used the higher-performance PowerPC chip designed by Apple, Motorola and IBM. PowerMacs run native PowerPC applications and emulate traditional Mac 680x0 applications. PowerPC chips have enjoyed substantial increases in performance over the years.

In the 2000s, Apple expanded their focus on software to include professional and prosumer video, music, and photo production solutions, with a view to promoting their computers as a "digital hub". It also introduced iPod, a portable digital music player which has become the most popular player on the market.

Mac OS, which stands for Macintosh Operating System, is a series of graphical user interface-based operating systems developed by Apple Computer for their Macintosh line of computer systems. The Mac OS is often credited with popularizing the graphical user interface.

Another important thing invented by apple is Macintosh Clones, capable of running Mac OS, notably Power Computing and Umax. These machines normally ran various versions of classic Mac OS.

In 1988, Apple released its first UNIX based OS, named A/UX. This was an operating system that seamlessly integrated the Mac OS look and feel with the power and flexibility of UNIX.

The graphical user interface used by Macintosh personal computers, which is modeled after an actual desktop and has little pictures (called icons) of file folders, a trash can for deleting files, etc. Pull-down menus and dragging objects originated with the Mac. For people who are not computer experts, the Macintosh user interface makes everything much easier to learn. Parts of this interface were developed by Xerox PARC, but never released.

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