Casio fx-590 – reviving an old friend - Machina Speculatrix
![](https://mansfield-devine.com/speculatrix/wp-content/uploads/2022/04/MSpeculatrix_Casio-fx590.jpg)
It was about to go in the recycling pile when I thought, “I wonder if I can save it.” There’s no telling how old this lovely Casio fx-590 calculator is, because in spite of deploying my best Google-fu I can find very little information on it. One source suggested that maybe it came out at the beginning of the 1990s. Read more »
![](https://i0.wp.com/mansfield-devine.com/speculatrix/wp-content/uploads/2016/03/20150618-0052_1250px.jpg?resize=350%2C200&ssl=1)
Casio fx-590 – reviving an old friend - Machina Speculatrix
![](https://i0.wp.com/mansfield-devine.com/speculatrix/wp-content/uploads/2022/02/MSpeculatrix_Elliott_405_brochure_3.jpg?resize=350%2C200&ssl=1)
Casio fx-590 – reviving an old friend - Machina Speculatrix
![](https://i0.wp.com/mansfield-devine.com/speculatrix/wp-content/uploads/2017/02/20170226-0014_600px.jpg?resize=350%2C200&ssl=1)
Casio fx-590 – reviving an old friend - Machina Speculatrix
![](https://mansfield-devine.com/speculatrix/wp-content/uploads/2022/04/MSpeculatrix_Casio-fx590.jpg)
Casio fx-590 – reviving an old friend - Machina Speculatrix