Computer organization is how operational attributes are linked together and contribute to realise the architectural specifications.
Computer architecture is the architectural attrributes like physical address memory,CPU and how they should be made and made to coordinate
with each other keeping the future demands and goals in mind.
Computer architecture comes before computer organiation.Its like building the design and architecture of house takes maximum time and then
organisation is building house by bricks or by latest technology keeping the basic layout and architecture of house in mind.