Techs & Trends
Grasping RAM, ROM, Flash, User, Built-in, and External Memory
Iâ€™m doing a report about Smartphones and the carriers for a non-profit organization called UCAN (www.ucan.org). Iâ€™m finding your site to be very helpful.
Iâ€™m trying to understand the seemingly interchangeable terms for memory that I find at different sites. I see RAM, ROM, Flash, User, Built-in, and External. The first and last a clear. Some phones donâ€™t show a ROM spec but they show a Flash spec. I know that Flash memory is not RAM because itâ€™s slower and I gather that it usually contains the OS + apps. Do some phones have the OS stored in a EPROM (i.e.ROM) instead of flash memory or are ROM and Flash the same?
Some phones show internal USER memory. I assume this to be part of either the flas...
The terms USER Memory and BUILT-IN Memory are not defined. Can you help here?
In the strictest sense, user available memory is a subset of this built-in memory on the device. Some of this non-ROM internal memory still has to be reserved for use by the operating system and actively running applications, so it is partitioned off and only a portion of the internal storage capacity would be made available for actual user data like the address book, media files, etc.