A hand-held weight control calculator which allows an individual to quickly and accurately determine the daily maximum food calories allowed for either maintaining body weight or for losing a particular number of pounds as a function of individual weight and activity level. The calculator includes a first indicia bearing disc having a plurality of radially arranged columns displaying daily calorie values disposed on its surface, with each column having a peripheral heading designating an individual weight range value and a registration arrow. A second smaller diameter disc is affixed to the center of the larger disc so that they rotate relative to each other, with the smaller disc including an observation window which is selectively registrable with a particular radial column disposed on the larger disc. The smaller disc includes a plurality of row headings displayed along one edge of the observation window which includes columnized indicia relative to the activity level of an individual such as "very active", "active" or "sedentary" with breakdowns in each activity level row for calories to maintain present weight or to lose a particular number of pounds per week. The device includes a third indicia bearing disc for determining the daily calories necessary for growth for individuals from infancy to adulthood.

Weighing apparatus for indicating weight which includes a scale for body weight, a calorie scale carried by the body weight scale, standard weight setting scale coordinated with the calorie scale so that a calorie intake will be indicated to lower or raise the body weight to bring it to the standard weight and an exercise scale for indicating amount of exercise and coordinated with the calorie scale to modify the calorie intake in accordance with the calories utilized as a result of the exercise.

A device for assisting a computer operator in the use of computer programs includes relatively movable cards bearing data areas thereon arranged in such a way that the operator can, firstly, by visual inspection, readily locate the desired operation to be performed by the program and, secondly, by moving the cards relative to one another, obtain, for that desired operation, information regarding the command to be entered into the computer.

A relatively small, compact, portable, hand-held, pre-programmed, dedicated, automatic calculator for dietary fat control, having a limited number of data enter keys, a cusom program, a memory for storing user-entered data, said program, and user prompts, a command and control system for executing said program to solve and evaluate automatic mathematical equations, and a display panel for showing user prompts, user-entered data and final results. With a first program the calculator solves for the percentage of fat calories, and evaluates for per serving contained in a given food item under evaluation using fat grams and total calories as inputs. In an alternate embodiment, a second programs allows the user to enter ones actual body weight or desired ideal body weight and it provides important results which disclose daily calorie intake allowance for a given body weight, determines the maximum daily fat grams intake allowance for that given body weight, and then the maximum daily saturated fat grams intake allowance for the given body weight.

An electronic digital readout diet scale for measuring and displaying weight information. A microcomputer is used to enable a dieter to enter a diet program having an objective weight and a given time interval. The scale will indicate the amount of weight to be lost or gained in order to achieve the objective weight as well as the deviation between the current weight and the projected weight according to the diet program.