Durabrand 828 Graphing Scientific Calculator LCD: 35 by 23 pixel graphing, 11 characters (the first 6 character postions overlap the graphing region), plus 3 characters for a scientific notation exponent or program steps remaining. 50 key keyboard (including the 4 positions of the 4-way rocker key). 26 memories (A-Z), plus an ANS (last answer) memory. 400 program steps, divided among up to ten program areas (P0-P9). Slip-on cover to protect the display and keyboard when the calculator is not in use.