![File:Vintage Casio Model 801 "Biolator" LED Pocket Electronic Calculator, Made in Japan, 1975 (8720348399) (2).jpg - Wikimedia Commons File:Vintage Casio Model 801 "Biolator" LED Pocket Electronic Calculator, Made in Japan, 1975 (8720348399) (2).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/4/44/Vintage_Casio_Model_801_%22Biolator%22_LED_Pocket_Electronic_Calculator%2C_Made_in_Japan%2C_1975_%288720348399%29_%282%29.jpg)
File:Vintage Casio Model 801 "Biolator" LED Pocket Electronic Calculator, Made in Japan, 1975 (8720348399) (2).jpg - Wikimedia Commons
PIIE National Student Congress - NOTICE: APPROVED CALCULATOR MODELS The list below includes calculator models that are allowed to be used during the Inter-University Quiz Competition as part of the National Student
![File:Vintage Casio Color Power Graphic Scientific Calculator, Model CFX-9970G, Made in Japan, Introduced In 1997 (32595351534).jpg - Wikimedia Commons File:Vintage Casio Color Power Graphic Scientific Calculator, Model CFX-9970G, Made in Japan, Introduced In 1997 (32595351534).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/f/fa/Vintage_Casio_Color_Power_Graphic_Scientific_Calculator%2C_Model_CFX-9970G%2C_Made_in_Japan%2C_Introduced_In_1997_%2832595351534%29.jpg)