Apparatus, process and product useful for source code patches. The computerized apparatus having a processor, the apparatus comprising: a source code obtainer for obtaining a source code of a computer program; a patch instructions obtainer for obtaining a set of source code patches instructions, wherein a first patch instructions comprise a set of modification instructions to the source code associated with a first source code patch, wherein a second patch instructions comprise a set of modification instruction to the source code associated with a second source code patch; a source code editor configured to display to a user the source code and annotations associated with applying each source code patch simultaneously; and wherein said source code editor is further configured to edit the source code in accordance with user input, wherein based on user input the first and second source code patch instructions are modified.