Apple Computers was Apple's first products, and to this day, has a history of 44 years.
Apple I
The Apple I was released on April 11, 1976, and was the first product Apple Inc (At the time, it was called Apple Computer Co.) Designed.
It only had a MOS Technology 6502 CPU running at 1MHz with a optional 4 or 8KB RAM.
Apple II
The Apple II was released in the June of 1977, and features a maximum 140KB Apple Disk II.
It has the same MOS Technology 6502 CPU, with 4 or 8KB RAM. It was compatible with Integer BASIC (An Operating System), and Apple DOS (Another Operating System).
Apple II Plus
The Apple II Plus was released in the June of 1979.
it features a 16, 32, 48, and 64KB RAM, with a 5 or 10MB Apple ProFile Hardware.
Still, it features the same CPU, but runs Apple ProDOS, and Apple Pascal.
Apple IIc
The Apple IIc was released on April 24, 1984, along with the Macintosh 128k.
It featured a WDC 65C02 CPU and up to 1.125MB of RAM. It has 16KB of ROM Built-in, and a 34-pin Memory Expansion Card Connector.
Apple IIe
The Apple IIe was released in 1983 and it had a 560 by 192 pixel display.
It featured a GTE 65C02 CPU at 1.023MHz.
It had 16KB of ROM Built in, and 64KB of RAM, which is expandable to 1MB.
Apple IIGS
The Apple IIGS was released on September 15, 1986, and featured a WDC 65C816 CPU at 2.8MHz.
It had 256KB of ROM Built in and 1MB of RAM, which is expandable to 8MB. It is compatible with Apple ProDOS, Apple GS/OS, and GNO/ME Operating Systems.
Apple III
The Apple III was released in 1980 and had Apple SOS (An Operating System) preinstalled. It had 128KB of RAM, and is expandable to 256KB. It also came with a Synertek 6502B CPU at 1.8MHz.
Apple Lisa
The Apple Lisa was released on January 19, 1983, and was also known as Locally Integrated Software Architecture.
It was compatible with Apple Lisa OS, and Xenix Operating Systems. It came with an Motorola 68000 CPU at 5MHz, and RAM upgradable to 2MB.