Own two different models of CE calculators
Color is what matters
Owning initially at least 3 calculators, but only color-LCD ones
Own at least 2 brands of calculators
Twice as many as most people!
Own at least 2 calculators... it's a start!
Own a Europe-specific calculator (CE-T and Nspire CX II-T…)
Own a France-specific calculator (76.fr, 82 Stats.fr, 82+, 83+.fr, 84 Pocket.fr, 82A, 83PCE, French Casios, French brands…)