A Pointing Device Allows You to Manipulate an On-Screen Pointer

question 22

Essay

A pointing device allows you to manipulate an on-screen pointer and other screen-based graphical controls.Please briefly describe each of these popular pointing devices: trackpads, trackballs, and joysticks.

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Definitions:

Horsetails

Members of the genus Equisetum, they are non-flowering plants with a hollow, jointed stem that reproduce through spores, often found in wet environments.

Carboniferous Period

A geologic period and system that spans 60 million years from the end of the Devonian Period 358.9 million years ago, to the beginning of the Permian Period, characterized by the first extensive forests of ferns and seed plants.

Protonema

A thread-like chain of cells that forms the earliest stage of a moss or fern life cycle, emerging from the spore and developing into the gametophyte.

Moss Spore

A reproductive unit capable of developing into a new moss plant, produced by mosses as a part of their life cycle.