Ventilators are typically used by ALS patients having difficulty breathing. There are several kinds of non-invasive ventilators, such as small devices that fit over the nose and mouth. Patients may also opt for a tracheostomy, a surgical procedure in which a tube is placed into the throat.
3. Counters. A counter is a digital sequential logic device that will go through a certain predefined states (for example counting up or down) based on the application of the input pulses. They are utilized in almost all computers and digital electronics systems [1].
counter noun [ C ] (SURFACE) B2 a long, flat, narrow surface or table in a shop, bank, restaurant, etc. at which people are served: There was nobody behind/on the counter when I went into the bank, and I had to wait to be served. You will find sausages on the meat counter/rolls on the bread counter.