'computers never do what you want them to do' task

ALGORITHMS: a logical sequence of steps for solving a problem (often written out in a flow chart) that can be translated into a computer program
PSEUDOCODE: a type of computer language that is used by the programmer to outline the algorithm before it's translated into code
MACHINE LANGUAGE: the only language a computer can read which consists of a collection of binary digits that the computer reads and interprets.
HIGH LEVEL COMPUTER LANGUAGE: an advanced computer programming language that isn't limited to the type of computer or for one specific job and is easily understood
FLOWCHART: it visually shows the sequence of instructions in a program with different symbols used to draw it

the beginning and ending symbols are normally ovals or rounded rectangles usually containing the word 'start' or 'end'
the decision making symbol is a diamond which normally have a 'yes or no' question in it
the action or process symbol is a rectangle with the command in it (eg. save changes)

here are the steps to opening a door: walk towards the door and stop one step away facing the door, raise arm and grip doorknob, turn doorknob anticlockwise and push open.