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Technical
The programme is written to be used on a single PC or a network.
It is to be used with operating systems from Windows 98 and onwards and on various networks.
I cannot guarantee that the programme will work on all network systems but no difficulties have been encountered on any of those used so far.
The number of records in the databases and invoicing is only restricted to what is practical to work with. The theoretical limit is not less than 200 000 000 records.