you are likely to find Processor in/at/on Computer. Computer is related to Code. Code is related to Size. 
Echo is a type of Software. you are likely to find Software in/at/on Shelf. you are likely to find Paint in/at/on Shelf. 
Processor --AtLocation--> Computer <--RelatedTo--> Code <--RelatedTo--> Size 
Echo --IsA--> Software --AtLocation--> Shelf <--AtLocation-- Paint 