# TI-73 series

> series of graphing calculators

**Wikidata**: [Q1837848](https://www.wikidata.org/wiki/Q1837848)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/TI-73_series)  
**Source**: https://4ort.xyz/entity/ti-73-series

## Summary
The TI-73 series is a line of graphing calculators manufactured by Texas Instruments. It is classified as a calculator model that utilizes the Zilog Z80 8-bit microprocessor. The series includes the TI-73 and TI-73 Explorer aliases and is capable of running alternative operating systems such as KnightOS.

## Key Facts
*   **Manufacturer:** Texas Instruments (an American multinational semiconductor company).
*   **Type:** Series of graphing calculators (subclass of graphing calculator).
*   **CPU:** Zilog Z80 (an 8-bit microprocessor).
*   **Aliases:** TI-73, TI-73 Explorer.
*   **Software Compatibility:** Capable of running KnightOS, an open-source Unix-like operating system.
*   **Manufacturer Founding:** Texas Instruments was founded on December 6, 1930.
*   **Manufacturer Headquarters:** Dallas, United States.
*   **Processor Origin:** The Zilog Z80 microprocessor was released in March 1976.

## FAQs
### Q: Who manufactures the TI-73 series?
A: The TI-73 series is manufactured by Texas Instruments, an American multinational semiconductor design and manufacturing company headquartered in Dallas.

### Q: What processor does the TI-73 series use?
A: The TI-73 series runs on the Zilog Z80, an 8-bit microprocessor.

### Q: Can the TI-73 series run third-party operating systems?
A: Yes, the TI-73 series supports KnightOS, which is an open-source Unix-like operating system designed for calculators.

## Why It Matters
The TI-73 series represents a specific tier in the Texas Instruments calculator lineup, utilizing the widely-adopted Zilog Z80 platform. This architecture connects the device to a broad ecosystem of software and development tools. Its compatibility with KnightOS highlights its relevance to the enthusiast and developer communities, allowing users to extend the device's functionality beyond its stock capabilities with a Unix-like environment. As a product of Texas Instruments, a major player in the semiconductor and education technology industries, the series serves as a tool for mathematical computation within the educational sector.

## Notable For
*   Being a distinct series of graphing calculators produced by industry leader Texas Instruments.
*   Utilizing the Zilog Z80, a historic 8-bit microprocessor architecture common in embedded systems.
*   Supporting KnightOS, distinguishing it as a platform capable of running open-source, Unix-like software.
*   Existing under multiple aliases, specifically the TI-73 and TI-73 Explorer.

## Body
### Manufacturer Overview
The TI-73 series is produced by Texas Instruments, an American multinational corporation founded on December 6, 1930. The company is headquartered in Dallas, United States, and operates within the electronics and semiconductor industries. As of the 2021 fiscal year, the company employed approximately 31,000 people.

### Hardware and Architecture
The device is categorized as a graphing calculator and functions as a specific calculator model. The central processing unit powering the series is the Zilog Z80. This 8-bit microprocessor was originally released in March 1976 and is a standard component in many calculator architectures.

### Operating System and Software
While the device ships with a native operating system, the TI-73 series is compatible with KnightOS. KnightOS is an open-source operating system that offers a Unix-like environment for compatible calculators. This capability allows for software customization and development within the TI-73 hardware environment.

### Aliases and Identification
The series is officially known as the TI-73 series but is also referred to by the aliases "TI-73" and "TI-73 Explorer." Visual references and media related to the device are categorized under "TI-73" on Wikimedia Commons.