The TRS-80 Pocket Computer, also known as the Tandy Pocket Computer or PC-1, was a series of early handheld electronic calculators and personal computers released by Tandy Corporation (RadioShack) in the late 1980s. The PC-1 was one of the first affordable pocket-sized computers available to the general public.

Some key features and details:

• Release Date The original TRS-80 Pocket Computer (PC-1) was introduced in 1980, while its successors, the PC-2 and PC-3, were released in 1982 and 1983, respectively.
• Design The TRS-80 Pocket Computers had a compact and portable design, resembling a calculator with a small QWERTY keyboard and an LCD display.
• Display The early models, such as the PC-1 and PC-2, featured a 24-character, single-line LCD display, which could show alphanumeric characters.
• Processor The devices were powered by a custom processor running at a relatively low clock speed (Sharp SC43177 4-bit @256kHz), but it was sufficient for basic computational tasks.
• Programming Capabilities One of the significant features of the TRS-80 Pocket Computers was their programmability. Users could write and run BASIC programs on these devices, making them early precursors to modern programmable calculators.
• Expansion The devices had limited memory and capabilities, but they offered expansion options, such as the PC-2's memory card slot for data storage.
• Successors As mentioned earlier, the PC-1 was followed by the PC-2 and PC-3 models. These successors added more features and improvements, such as better displays and increased memory.
• Impact The TRS-80 Pocket Computers were popular among hobbyists, students, and professionals who needed a portable computing device for simple calculations and basic programming tasks.

The CPU of the pocket PC was the Sharp SC43177 processor. SC stands for Simple Computer/Machine Processor. The processor was manufactured by National Semiconductor, was a simple 8-bit microprocessor that gained popularity in the late 1970s and early 1980s. It was designed for embedded systems and small computers, making it a suitable choice for the TRS-80 Pocket Computer due to its low power requirements and cost-effectiveness.