Not a Type of Key: None of these

Explanation:
The question asks which of the following is not a type of key. Let's examine each option to determine if it is a type of key or not.

a) Alphabetic Keys:
Alphabetic keys refer to the keys on a keyboard that are used to input letters of the alphabet. These keys are commonly used for typing and are essential for any text-based input. Therefore, alphabetic keys are a type of key.

b) Numeric Keys:
Numeric keys refer to the keys on a keyboard that are used to input numbers. These keys are typically arranged in a numeric keypad or as a separate set of keys above the alphabetic keys. Numeric keys are commonly used for numerical input and calculations. Therefore, numeric keys are a type of key.

c) Function Keys:
Function keys, often labeled as F1, F2, F3, and so on, are a set of keys on a keyboard that have special functions assigned to them. These functions can vary depending on the operating system or software being used. Function keys are commonly used for shortcuts, such as opening a help menu or saving a document. Therefore, function keys are a type of key.

d) Toggle Keys:
Toggle keys refer to a group of keys on a keyboard that can be toggled on or off. Examples of toggle keys include the Caps Lock key, Num Lock key, and Scroll Lock key. These keys change the behavior of the keyboard when they are toggled on. For example, the Caps Lock key toggles the case of letters between uppercase and lowercase. Therefore, toggle keys are a type of key.

Based on the above analysis, all of the options (a, b, c, and d) are types of keys. Therefore, the correct answer is e) None of these.