The HP-30 or Spice series are RPN Scientific hand-held calculators introduced by Hewlett-Packard in 1978.

The display provided better readability by increasing the digit size and adding commas.

[4] The HP-37E and 38E/C were the financial models of the Spice series.

The battery of these calculators can be changed without using tools.

[7] As this calculator is regarded amongst the very good in terms of quality, key stroke feel and daily usability for engineers.