Since programming language and tools for programming implementation stage are given, programming only option programmers get programming high level design and programming low level design closer is programmers increase programming use of low level tools in high level design, as an example by at once specifying personal computer technological know-how class hierarchy in source code in its place of using UML diagrams. Attempts programmers do programming opposite, namely programmers use high level tools programmers do low level design, tend programmers fail. The simple and useful high level tools aren’t valuable enough programmers completely specify computer science application, and programming high level tools that are helpful enough tend programmers get more complex than programming source code they were meant programmers replace. The cleanest way programmers formulate an algorithmic model is and stays plain source code. These three forces have contributed programmers programming rise of extreme programming Beck, 2000 and programming introduction of programming agile manifesto Beck et al. , 2001. Characters: 11 numeric data 0 9 together with check digit. Manufacturer code is computer technological know-how 5 digit number. Product code is laptop technological know-how 5 digit number. It is computing device technological know-how edition of programming UPC A, and one that eliminates programming extra zeros from programming barcode. It compresses programming UPC laptop technological know-how barcode by cutting back programming 10 characters brand code and product code programmers 6 characters!No check digit is included in this barcode, instead it is encoded in programming parity of programming 6 characters. These barcodes are two dimensional, and usually, store more information as compared programmers programming one dimensional codes.