`  ==Substantial revision==  I have made a substantial revision to previous version.  [AA: which we are trying to revise properly in a cooperative spirit].   I think intro needs to be clear, to the point, and orient the reader to the main points. There were a number of uncited statments and the essence of key points appeared to depend heavily on Aristotle, whereas there have been major developments since!   [AA: we shouldn't undervalue the background knowledge on quantity].   I have omitted certain statements that were either very difficult to follow or erroneous as formulated: e.g. the statement that units are not divisible is not correct unqualified - units of continuous quantity are divisible, units of 'multitudes' are not (e.g. an applie is no longer a unit in a count of applies if sliced in half). I am open to discussion and debate on these points but I strongly urge citations to justify the re-introduction of omissions. The article still needs further revision and omissions, but this revision is a start.    ==Introduction==  HOLON insists on such an intro: In science and philosophy a quantity is a property or relation that exists in a range of magnitudes, such as the range of all lengths.  [AA:  in reality (as a matter of fact), quantity is a basic property of things that exists as magnitudes and multitudes]. All the following is irrelevant to introduction or just defective and unverified:  [ AA: in fact, the cases of quantitative properties are both physical quantities and mathematical quantities, as well as numbers].  In classical terms, two magnitudes of a continuous quantity stand in relation to one another as ratios which, in turn, are real numbers. Such continuous quantities possess a particular structure, which was first explicitly characterized by Hölder (1901) as a set of axioms which define such features as identites and relations between mangitudes.[AA comments: unverified statement].  The term quantity may also refer to a multitude such as a number of apples or sub-atomic particles [AA comment: this property must be included in the definition, not mentioned at the end]  AZAMAT included the following in intro: ``Commonly, quantity is viewed as the state of being much, or the basic property of things existing as magnitudes or multitudes.`` Quantity is not the basic property of things existing as magnitudes or multitudes. A given thing may have many properties that are quantitative, such as mass, volume, charge and so on. Quantity is a type of property that exists in a range of magnitudes. [right is Quantity is a type of property existing as magnitude and multitude]. Azamat also included the following in intro: ``Of entities which pertain to quantities, some are such by their inner nature (as number), while others are functioning as states (properties, dimensions, attributes) and modifications like as heavy and light, long and short, broad and narrow, small and great, or much and little.`` The statement: ``of entities which pertain to quantities ...`` is confusing  entities may possess quantitative properties, but it is unclear what is meant by entities which pertain to quantities. Is this supposed to mean abstract entities which are quantities?? [read as: of things which pertain to quantities] In what sense do they 'function as states'? [As STATES of Substances or Objects]. I have replaced the introduction, [worsening it]. Please discuss these changes: they do not enhance the article.    Various sections other than the introduction are also unclear, but I have not had time to make comments. I will do so soon. [AA: don't do anything, before discussion]. The article must be balanced. Quantity is important in science, not only philosophy. Regards.    I tried working with some ideas I had and I got this for an intro:   ``Quantity refers to number or amount as a property of abstract or concrete objects. In modern thinking it is commonly compared with the notion of quality. In the case of abstract objects, quantity and relationships between quantities have mathematical foundations. With concrete objects, quantities are measurements or observations of physical objects or systems, such as position measuring relative distances or temperature measuring the average energy of particles’ speed in a system.  In mathematics, quantity is essentially another term for number. Numbers are said to be discrete or continuous (see reals/real numbers/continuum). Numbe