What does it mean when something is the tip of this ice burg

The meaning of the phrase " the tip of the/this iceberg, refers to a small part of a very large or serious problem, so something at the tip of the iceberg is a smaller part of something big.

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professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).