How the ENIAC Computer Processes Data Using Electronic Pulses

A foundational 1964 patent describing how the ENIAC computer used sequences of electronic pulses to store, read, and process numerical and qualitative data.

What it covers

The patent describes a system that uses electronic pulses to represent information. It generates sequences of pulses and divides them into groups. Some pulses are selected to represent quantitative values (the numbers being calculated), while others represent qualitative values (the instructions or commands for what to do with those numbers). The system reads this data, stores it, and then uses the qualitative pulses to trigger specific switching operations that act upon the quantitative values.

What it doesn't cover

• —Does not cover modern binary computing architectures using transistors or silicon chips.
• —Does not cover software-based programming methods stored on magnetic or solid-state memory.
• —Does not cover general-purpose computers that do not rely on this specific pulse-sequencing hardware architecture.

The clever bit

It treats information as a series of electronic pulses where the timing and selection of the pulse determines whether the computer is 'thinking' (qualitative) or 'calculating' (quantitative).

Why it matters

This patent represents the core logic of the ENIAC, one of the world's first general-purpose electronic digital computers. It marked the transition from mechanical calculation to electronic processing, fundamentally changing how humanity approaches complex mathematics and logistics.

Real-world examples

• 1.ENIAC (Electronic Numerical Integrator and Computer)