In particular, the Arbuthnott Commission reported that Scottish European elections should use STV to reduce the number of different systems to three, and that elections for the Scottish parliament and local government should be held on different days to reduce the potential for voter confusion. (politics.stackexchange.com)
«When we recall a recent birthday party, for example, the brain likely activates a number of different systems, such as a system that is responsible for retrieving memory of events, a system that is responsible for building a vivid scene in our mind, and a system that is responsible for moving back in time. (sciencedaily.com)
We were able to reconstruct a number of different systems by testing two or three explicit hypotheses.» (sciencedaily.com)