Similarity
👫
"They're different, I swear!"
Own the same model of calculator from at least 3 different factories
Colorful
🔳
Grayscale is more than enough
Owning initially at least 3 calculators, but no color-LCD ones
Quantity
🥉
Passionate
Own at least 10 calculators
✌️
Twice as many as most people!
Own at least 2 calculators... it's a start!
Localization
🇪🇺
Guten Tag!
Own a Europe-specific calculator (CE-T and Nspire CX II-T…)