an array of linked lists

an array that has a prime number of elements

an array that holds pointers to entries indexed by hash value

an array whose indexes are literals instead of numbers

an array with linked lists of duplicates and collisions hanging from it

a string-to-value relationship that is similar to an array

A hash table is in effect an array, but elements are not added from front to back. The array has a fixed size and some property of the element to add decides where it will be put.