Depending on the PDA there are external memory storage which features an additional memory card that you are attached to the the PDA.
Handheld PDAs are available from Amazon. Alternatively you can purchase handheld PDAs from eBay and other online sites new. You can also buy them second hand from Gumtree.
A data storage memory area, and an input/output device such as a keyboard and a touchscreen or a liquid crystal display (LCD) screen on which symbols, text or icons are displayed and, into which signals can be input and detected thereby providing a two way communications capability by which information can be stored in an retrieved from memory that is part of the personal digital assistant computer. Personal digital assistants can be used to store, display, and/or manipulate various personal information.
In computers, RAM is used for temporary storage. PDAs, however, use RAM as their main storage. 99% of the apps you install are saved to RAM.
A palm pdas is extremely easy to use. You will get it home, charge it up, and then get going. They have live customer service available during business hours for assistance.
Sharp makes a Linux based PDA which is the smallest in the world.
As technology has evolved so have devices with a memory. Some devices other than a computer that have a memory are cell phones, PDAs, game consoles, care radios, VCRs and TVs.
They generally use either micro SD or SDHD.It seems to be evenly divided now.
The most common forms of PDAs are Smartphones, palm PDAs and pocket PCs.
Almost all PDA's have custom covers available. The iPod, if you consider it a PDA, has a huge variety of covers for purchase.
All PDAs are very lightweight these days, but you may want to consider the Palm TX.
X - Palm OS Garnet 5.4 312 MHz has applications that are available for download.
In my opinion, Blackberry and Palm make the most functional PDAs