Sharp EL-533 Financial Calculator - computers - by owner - electronics sale - craigslist
Virtual Museum of Calculators
Sharp EL-506TSBBW 12-Digit Engineering/Scientific Calculator with Protective Hard Cover, Battery and Solar Hybrid Powered LCD Display, Great for Students and Professionals, Black : Office Products - Amazon.com
Original Sharp EL - 506 S, Not a Computer but still cool. : r/VintageComputers