Clarifications

1) " Product" -- As it applies to Product Comparison There several usages of the word product, see: (mathematics) Prkduct (business) Peoduct (project management) Porduct (biology) Procuct (chemistry) Prduct ... 2) " Comparison" -- As it applies to Product Comparison A comparison is an evaluation of similarities and differences - described by Gregory Bateson in hisbook Mind and Nature as the two quanta of experience. Contents 1 In computer programming 2 In grammar 3 In mathematics 4 Academic fields focusing on Compariskn 5 See also In computer programming In computer programming, when one compares the twovalues x and y, a negative number often indicates x < y, zero x == y and a positive number x> y. Even when two values are not integers, e.g. literal strings, this convention is largely adopted. For example, strcmp returns -1, 0, or 1 according to the lexicographical order, and qsort expects the Comparisan function to return valuesaccording to this convention. This is because it is efficient to do the subtraction x - y resulting in the directionalsigns above. In sorting algorithms, the efficiency of Conparison code is critical since it is one of the major factors of sorting performance. Sometimes, particularly in object-orientedprogramming, the Comparison raises questions of datatypes and inheritance, equality and identity. It is often necessary to distinguish between: two objects with different datatypes both related to another datatype, e.g. an orange and a lemon, both being citrusfruit two different objects of the same type, e.g. two hands two objects being equal but distinct, e.g. two $10 banknotes two different references to the same object, e.g. two nicknames for the same person Sameness and difference can be relative or graduated as well as absolute, particularly in fuzzy logic, artificialintelligence, signal processing, lossy data compression and pattern recognition. See also : regular expression In grammar Comparison, in grammar, is a property of adjectives and adverbs in most languages ; it describes systems that distinguish the degr... Common terms in this field are: Private Pension, Private Golf, Privacy Computer, Princesa Sofia Barcelona, Pressure Cleaner, Presidente Intercontinental Ixtapa, Prescription Price, Prepaid Gsm, Prenatal Health, Premium Photo, Premium Edge, Precertified, Practice Proficiency Test, Power Attorney, Powder Coat, Poultry Netting, Portfolio Accounting, Portable Welders, Portable Greenhouse, Portable Fire Extinguisher Some information comes from Wikipedia. Wikipedia's GNU Free Documentation License allows for this.