Mana is a program to manipulate and display 1-D (vector) and 2-D (matrix) data. Mana has a simple command-line interaction that resembles the UNIX tcsh, but with many additional useful features. Mana consists of several, vaguely independant portions: the command-line interpreter language (Opihi), the image display tool (Kii), the graphing tool (Kapa), and the vector and matrix manipulation commands.