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.
There were many early devices invented from 1575-1860s that were similar to typewriters. The first commercially sold typewriter however, was the Hansen Writing Ball. It was invented by Rev. Rasmus Malling-Hansen of Denmark in 1865. Five years later in 1870, his invention was first sold commercially.