Main memory is the primary, internal workspace in the computer, commonly known as RAM (random access memory). Specifications such as 4GB, 8GB, 12GB and 16GB almost always refer to the capacity of RAM. In contrast, disk or solid state storage capacities in a computer are typically 128GB or 256GB and higher. In a smartphone or tablet, solid state storage generally starts at 32GB or 64GB. The exception to these rules is the Chromebook, which may have only 16GB of solid state storage (see Chromebook). See memory and storage.
The primary memory of a computer: it is random-access and stores the programs and data while they are being processed.
The main memory is defined as the central storage in a computer.
An example of the main memory is where programs and data are kept.