eps is "earnings per share". this denotes the earnings made by a company for each share. that means, net profit divided by the total number of shares is the eps of the company. it shows the earning capacity of the company. hence, higher the eps, it is advantageous
p/e ratio is 'market price' of the share divided by 'eps' of the company. this denotes whether the company's shares are under priced or over priced. a company with a lesser p/e ratio is considered to be under priced and their prices are bound to go up, in the normal conditions.
face value of a share is the original price of the share over which eps, book value, etc will be calculate. if a share whose face value is Rs.10/- is being quoted in the market for Rs.250/-, if the company declares a dividend of say 50%, the shareholders will get Rs.5/- per share as dividend (i.e., 50% of the face value - Rs.10/-)