From Clay Tablets to Smartphones

What Counts as Analog

Analog means information is represented as a continuous, physical signal that changes smoothly, like a wave. Analog devices mirror the real world directly, without breaking information into separate numerical units.

    • Sundial

    • Hourglass

    • Thermometer (mercury)

    • Vinyl record player

    • Film camera

    • Analog radio

    • Mechanical watch

    • Barometer (aneroid)

    • Slide rule

    • Oscilloscope (analog)

    What Counts as Digital

    Digital means information is stored and processed using discrete units, like numbers or binary code. Digital devices convert real-world signals into data that can be easily copied, shared, and manipulated.

    • Abacus

    • Digital clock

    • Calculator

    • Digital camera

    • Smartphone

    • Computer

    • GPS device

    • Digital thermometer

    • Digital radio

    • Tablet (iPad, etc.)

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