The origin of cosmic rays is a continuing problem in Astrophysics. The majo
rity appear to be of Galactic origin and the manner of acceleration seems t
o involve ions from the ISM being accelerated by shocks from supernova remn
ants. Dust in the ISM may also play apart in the early stages. The paper gi
ves a brief account of the origin problem and the likely acceleration mecha
nisms.