The API keys were hard-coded into the script, which caused a major security issue.

She hard-codes the discount rate into the pricing algorithm, making adjustments difficult later.

Please file the documents in the colour-coded folders on the shelf.

The teacher colour-coded the study materials to help students find topics more easily.

During the museum tour, the volunteer demonstrated several historical Morse codes and explained how they were used to send urgent messages.

During the communication exercise, the operators practiced sending messages using Wabun codes to ensure clarity under noisy conditions.

The rural district was zip coded last spring to streamline emergency services.

The postal interns were zip coding thousands of returned forms before the holiday rush.

The online form requires you to enter the correct postage codes for international shipments.

During the audit, she found several RST codes that needed to be documented.