They usually come in clusters such as linear arrays.

This linear array is further organized into two regions:

A linear array of electrodes is often used to create a curtain of corona plasma.

Figure 7 illustrates how a linear array is used for 2D thermoacoustic imaging.

When the array is arranged in a straight line this is called a linear array.

Early surveys (beginning in the mid 20th century) often used the Wenner array, which was a linear array of four probes.

Systems having long linear arrays of many electrodes are often used in geological applications, and less commonly in archaeology.

Figure 1 illustrates a six-element uniform linear array.

Or, more plausibly, by copying some linear array which had an intrinsic capacity to fold itself up?

Vector processors have high-level operations that work on linear arrays of numbers or vectors.