The eMate 300 was a personal digital assistant designed, manufactured and sold by Apple to the education market as a low-cost laptop running the Newton operating system. The eMate was introduced March 7, 1997 for US$800 and was discontinued along with the Apple Newton product line and its operating system on February 27, 1998.

The eMate 300 featured a 480x320 resolution 16-shade grayscale display with a backlight, a stylus pen, a full-sized keyboard, an infrared port, and standard Macintosh serial/LocalTalk ports. Power came from built-in rechargeable batteries, which lasted up to 28 hours on full charge. In order to achieve its low price, the eMate 300 did not have all the features of the contemporary Newton equivalent, the MessagePad 2000. The eMate used a 25 MHz ARM 710a RISC processor and had less memory than the MessagePad 2000 which used a StrongARM 110 RISC processor and was more expandable.

Unlike the MessagePad line, the eMate 300 features an internal memory expansion slot. It is located in the hatch under the battery door, next to the ROM card. Both cards fit into both slots, but the ROM card is larger. The expansion card is on the left. Companies like Newertech produced cards for the eMate. Most cards expanded the data bus from 16 bits to 32 bits, as well as providing additional DRAM (program memory), and flash (storage). When one of these cards is installed, the internal DRAM is disabled, but the internal flash RAM is combined with the flash on the card. For example: If a memory card were to have 4mb of DRAM and 2mb of flash, the newton would report having 4mb of flash, and 4mb of DRAM, not 5mb of DRAM.

Year 300 (CCC) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius (or, less frequently, year 1053 Ab urbe condita). The denomination 300 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.