[buildbuildbuild]

This remains common in aerospace, each voting computer is referred to as a "string". https://space.stackexchange.com/questions/45076/what-is-a-fl...

[sroussey]

In aerospace where this is common, you often had multiple implementations, as you wanted to avoid software bugs made by humans. Problem was, different teams often created the same error at the same place, so it wasn’t as effective as it would have seemed.