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A trident of three branches ending in a circle, a triangle and a square, marking a USB port.
Also known as: USB trident, Fork with a circle and a square
The USB trident marks a Universal Serial Bus port or plug. Its three differently-shaped ends represent the variety of peripherals a single bus can carry — the design's whole argument, made at a time when every peripheral had its own connector.
Ends its three branches in three different shapes — a circle, a triangle and a square — to represent the range of devices one bus can carry, in contrast to the dedicated connector each peripheral needed before it.
Contexts: Software
Is drawn with the trident's shaft ending in a plain circle at one end, which is the detail that distinguishes it from the many decorative tridents it resembles.
Contexts: Software
A straight shaft beginning in a filled circle and branching near its far end into three arms, which terminate respectively in a filled circle, a filled triangle and an open square.
Both mark a connection standard on the same class of device.