Sand dunes

In physical geography, a dune is a mount of sand built by eolian (wind-related) processes. Bare dunes are subject to changing location and size based on their interaction with the wind. The "valley" or furrow between dunes is called a slack.

Some coastal areas have one or more sets of dunes running parallel to the shoreline straight inland from the beach. In most such cases the dunes are important in caring the land against potential ravages by storm waves from the sea. Although the most broadly distributed dunes are those associated with coastal regions, the largest complexes of dunes are found inland in dry regions and associated with ancient lake or sea beds.Dunes also form below the action of water flow (Alluvial processes), on sand or gravel beds of rivers, estuaries and the sea-bed.

Mainframes

Mainframes (often colloquially referred to as big iron) are huge and expensive computers used mainly by government institutions and large companies for mission critical applications, usually bulk data processing such as censuses, industry/consumer statistics, ERP, and financial transaction processing.

The term originated during the early 1970s with the introduction of smaller, fewer complex computers such as the DEC PDP-8 and PDP-11 series, which became known as minicomputers or just minis. The industry/users then coined the term "mainframe" to describe bigger, earlier types (previously known simply as "computers").

Cookie

In the United States and Canada, a cookie is a tiny, round, flat cake. In most English-speaking countries outer North America, the most common word for this is biscuit; in many regions both terms are used, while in others the two words have diverse meanings—a cookie is a bun in Scotland, while in the United States a biscuit is a kind of quick bread not unlike a scone.