Adding machines are mechanical calculators that allow users to perform mathematical computations quickly and accurately. They were widely used in offices and retail establishments prior to the widespread use of computers. The ability to operate an adding machine was considered a basic clerical skill and was commonly taught in business and vocational schools. Today, the use of adding machines has largely been replaced by digital calculators and software. However, the basic principles of counting and performing basic math functions remain an important skill in many professions.

Harmonized Systems refers to an internationally standardized system of names and numbers for classifying traded products. This skill involves understanding the coding structure and rules that facilitate the identification and categorization of goods in international trade. Knowledge of Harmonized Systems is used to ensure compliance with customs regulations, streamline trade processes, and enhance communication between trading partners by providing a common language for product classification.

Microform refers to a method of storing and reproducing documents in a miniature format, typically on film or paper. This skill involves the use of specialized equipment to create, view, and manage microform materials, which are often utilized for archiving and preserving large volumes of information in a space-efficient manner. Knowledge of Microform is applied in libraries, archives, and research institutions to facilitate access to historical documents and ensure the longevity of important records.

Office equipment refers to various machines and tools that are used to perform tasks in an office setting. This can include printers, computers, scanners, copiers, telephones, and other equipment that is necessary to complete office work. Managing and maintaining office equipment requires specialized knowledge and skills, such as troubleshooting, repair, and maintenance. Employees who are responsible for office equipment must be trained and have experience in order to ensure that the equipment is functioning properly, efficient, and effective for the needs of the office.

Traveler's checks are a specialized form of currency that allow travelers to bring large sums of money with them on their travels without the risks associated with carrying cash. This specialized skill involves understanding how to purchase, use, and redeem traveler's checks, as well as the safety and security measures involved in their use. With the rise of alternative payment methods like credit cards and digital wallets, the use of traveler's checks has diminished, making this a skill that is less commonly used today.