If anyone is interested, here is the current split
on network mail software in use on the network:

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Statistics for:                   2/93        4/93        7/93
                                  ~~~~        ~~~~        ~~~~
.QWK-Type Systems:                 58          71          80
PCRelay Systems:                   17          16          15
NetMail Systems:                   14           4           4
National HUB:                       1           1           1
                                 ------      ------      ------
Total Systems on the Network:      90          92         100

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Hub Statistics for:               2/93        4/93        7/93
                                  ~~~~        ~~~~        ~~~~
National Hub:                       1           1           1
Regional Hubs:                     15          16          17
Local Hubs:                         9           9           9
Cross-Network Links:                3           2           2
                                 ------      ------      ------
Total Hubs on the Network:         28          28          29

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Mail Programs Run by Hubs for:    2/93        4/93        7/93
                                  ~~~~        ~~~~        ~~~~
.QWK Mailers:                      20          23          24
PCRelay 4.1:                        8           8           7
NET/Mail 4.0+:                      6           4           5
PostLink 1.04+:                     0           0           1

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