a stream should be thought of merely as a collection of data going to or coming from a piece of hardware, and
- следует думать как просто колекция данных идущих к или от части устройсва
In fact each stream really has two components,
an input stream and
an output stream.
a channel should be associated with a particular piece of hardware such as a printer.
- должен быть сопоставлен с конкретный устройством такой как принтер
Initially there are four channels -
'K' - 'keyboard'
'S' - 'screen'
'R' - 'work space' - an internal channel used by the Spectrum to send data to the edit buffer.
'P' - 'printer'