In mathematics, it is sometimes used to denote the logical conjunction, or "and" operation.

The ampersand, also known as the and sign, is the logogram &, representing the conjunction "and". It originated as a ligature of the letters of the word et (Latin for "and"). [1] Ampersand: the sign &; the name being a corruption of 'and per se = and'; i.e. ' & by itself = and'.

提供JEL分类号。以下关于JEL 分类系统和分类号的. 学界广泛采用。该分类方法主要采用开头的一个英文字母与随后的两位阿拉伯数字一起对经济学各部类进行“ 辞 .

2009年8月1日 · Olyan problémám lenne, hogy semmilyen programban nem tudok "&" jelet írni. (altgr+c) Se angol se magyar bill. kiosztásról sem (..

Information, easy-to-copy variants, customizer, and more. This symbol, also known as ampersand, is often used as an alternative to "and" word. On most popular keyboard layouts, …

JEL分类系统，是美国经济学会《经济文献杂志》（Journal of Economic Literature）所创立的对经济学文献的主题分类系统，并被现代西方经济学界广泛采用。 该分类方法主要采用开头的一个英文字母与随后的两位阿拉伯数字一起对经济学各部类进行“辞书式”编码分类。

我发的帖子被审核了，你可以搜下AEA加JEL codes，里面有说明。 这个分类号写几个没定数的，其实有点类似关键词的作法，和几个领域相关就写几个。 一般2、3个，基本不超过5个。 …

Az et jel, és jel vagy ampersand (&) egy logogramma, ami az „és” kötőszót jelöli. A jel a latin et betűiből álló ligatúra. Eredete felismerhető a második képen. Az első – népszerűbb – változat későbbi korból származik.

The "JEL" classification system originated with the Journal of Economic Literature and is a standard method of classifying scholarly literature in the field of economics. It is used in many of the AEA's published research materials.

The JEL classification system was developed for use in the Journal of Economic Literature (JEL), and is a standard method of classifying scholarly literature in the field of economics. The system is used to classify articles, dissertations, books, book reviews, and working papers in EconLit, and in many other applications.