Briefly describe the seven coding methods used by companies with examples.?

What will be an ideal response?

• Sequence codes are numbers or letters assigned in a specific order. Sequence codes contain no additional information other than an indication of order of entry into the system. For example, a human resource system issues consecutive employee numbers to identify employees. Because the codes are assigned in the order in which employees are hired, the code can be used to see that employee number 584 was hired after employee number 433. The code, however, does not indicate the starting date of either person's employment.• Block sequence codes use blocks of numbers for different classifications. College course numbers usually are assigned using a block sequence code. 100-level courses, such as Chemistry 110 and Mathematics 125, are freshman- level courses, whereas course numbers in the 200s indicate sophomore-level courses. Within a particular block, the sequence of numbers can have some additional meaning, such as when English 151 is the prerequisite for English 152.• Alphabetic codes use alphabet letters to distinguish one item from another based on a category, an abbreviation, or an easy-to-remember value, called a mnemonic code. Many classification codes fit more than one of the following definitions:• Category codes identify a group of related items. For example, a local department store uses a two-character category code to identify the department in which a product is sold: GN for gardening supplies, HW for hardware, and EL for electronics.• Abbreviation codes are alphabetic abbreviations. For example, standard state codes include NY for New York, ME for Maine, and MN for Minnesota. Some abbreviation codes are called mnemonic codes because they use a specific combination of letters that are easy to remember. Many three-character airport codes are mnemonic codes, such as DEN for Denver, and MIA for Miami. However, some airport codes are not mnemonic, such as ORD (O'Hare) or MCO (Orlando).• Significant digit codes distinguish items by using a series of subgroups of digits. Postal codes, for example, are significant digit codes. Other such codes include inventory location codes that consist of a two-digit warehouse code, followed by a one-digit floor number code, a two-digit section code, a one-digit aisle number, and a two-digit bin number code.• Derivation codes combine data from different item attributes, or characteristics. Most magazine subscription codes are derivation codes. For example, one popular magazine uses a subscriber's five-digit postal code, followed by the first, third, and fourth letters of the subscriber's last name, the last two digits of the subscriber's house number, and the first, third, and fourth letters of the subscriber's street name.• Cipher codes use a keyword to encode a number. A retail store, for example, might use a 10-letter word, such as CAMPGROUND, to code wholesale prices, where the letter C represents 1, A represents 2, and so on. Thus, the code, GRAND, indicates that the store paid $562.90 for the item.• Action codes indicate what action is to be taken with an associated item. For example, a student records program might prompt a user to enter or click an action code such as D (to display a record), A (to add a record), and X (to exit the program).?