Maureen, welcome. If you need the Tekton for any business reason ... buy it. Otherwise there are the Technical by Corel, the Technical Regular by WSI, the TechnicsDB Italic by Christine Mauerkirchner and Rainer Grunert (don't be fooled by the 'Italic'), the TriathlonDB Normal also by Christine Mauerkirchner and Rainer Grunert (this one has the Euro sign) and then another 5 which are not 100% copies of the Tekton, the
Architect by Hank Gillette, the Architetto by anonymous(e), the Woolkarth-Bold-Bold also by Hank Gillette (note: the lower case e is missing), the Wright Bold by SWFTE (nasty little thing at small sizes) and the Write also by SFWFTE (same problem).
Want a more jolly approach? Make friends with CatholicSchoolgirls.
Have fun and ... be nice to the cats
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Relax ... it is just a font