Most common calculators in the forum?

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Hello.
This is my collection:

Hewlett-Packard 10C
Hewlett-Packard 11C x 2
Hewlett-Packard 12C x 2
Hewlett-Packard 15C (bought new 1984)
Hewlett-Packard 16C
Hewlett-Packard 28C
Hewlett-Packard 28S
Hewlett-Packard 32S
Hewlett-Packard 32SII (bought new 2000)
Hewlett-Packard 33C
Hewlett-Packard 41C
Hewlett-Packard 41CV (bought new 1985, not working)
Hewlett-Packard 41CX (bought new 1986)
Hewlett-Packard 42S x 2
Hewlett-Packard 48G
Hewlett-Packard 48SX (not working)
Hewlett-Packard 97
Hewlett-Packard 100LX

Casio 8E
Casio FC-100 x 2
Casio fx-10
Casio fx-19
Casio fx-29
Casio fx-39
Casio fx-120
Casio fx-140
Casio FX-602P (bought new 1983)
Casio FX-720P
Casio Memory-10GT
Casio Mini CM-602
Casio Mini CM-604
Casio PB-700
Casio personal-I
Casio pocket-mini

Intelect (Nixie Tubes)
Microcifra 10 (RPN) x 2
Sanyo ICC-808D
Texas Instruments TI-2550
Some other old 4 op. calculators