Abstract: Since the traditional computer based on semiconductor technology is hard to meet people's requirements in information storage and processing, and the development of integrated circuit has ...

The inability to pronounce the letter r is called rhotacism mdash;a quiet irony in speech pathology, where sufferers lack the ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...