The principal properties of energetic particles accelerated in solar flares are reviewed. Particular emphasis is placed on the high energy flare component whose acceleration is often referred to as second phase acceleration. Stochastic Fermi acceleration is treated analytically, and the results of the computation are compared with particle and gamma ray data to deduce information on the timing of the acceleration, the spectrum of the particles and the energy content of the nucleonic component. A discussion of 3He and heavy element abundances is also presented.