The most frequent autonomic symptoms associated with multiple system atrophy are a sudden drop in blood pressure upon standing (orthostatic hypotension), urinary difficulties, and erectile dysfunction in men.
The IBM Selectric typewriter was a highly successful model line of electric typewriters introduced by IBM on 31 July 1961.
From 1829 to 1870, many printing or typing machines were patented by inventors in Europe and America, but none went into commercial production. 1  American Charles Thurber developed multiple patents, of which his first in 1843 was developed as an aid to the blind, such as the 1845 Chirographer.