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A vast support network exists for the T/S1000/ZX81: wherever goes the most popular computer in history, user groups are not far behind. Below is a list of many such groups in the United States; as new ones are springing up all the time, we make no claims that it is inclusive. Whenever two or more T/S1000/ZX81 enthusiasts meet, there you see the beginnings of a group; and as there are now more than 600,000 T/S1000/ZX81 computers sold in the United States, such meetings are becoming increasingly common. So if we have omitted your group, we apologize — and do let us know so we can include it in an update.