![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieQ_cNrdT0BLwbIhTMgiSeaSAnQUvI20PI8kvxXiW-DjzjL7ve5gUxlugwWNqJ8ja7J6W7J1o5wR07pOnSjYMRDJUxWhE4a5KdreX8zlgh5_TWP9wPP4VUt68sZ8n2hx0bw0M_sRpZbN4/s400/manual-calc-IMG_0914.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipJ8phR7guWppAg7C4OqDGRGh9lqZyxZ9NU2mFqBH7ini_KSHq-ZInjGBaA7m5x5_NB5dFJF5OtMqrvFGuu6XSZOZtkvZjkK-r5-vU1UZKKpWsFeUHTfACh0fRMxnWM9ZcG-H1mIL3BEQ/s200/maps-IMG_0898.jpg)
However I wonder what we loose by make things digital and whether or not this matters. Having a database (a box with cardboard dividers and a lot of paper slips) or a typewriter (with types that are moved by pressing buttons) on your desktop gives you a very immediate impression how things work. It is remarkable to see that historically tangibility of teaching materials was very common.
I think in the digital we should make more effort to provide means that people can understand the mechanism behind the technology (basics of HCI – conceptual models :-). This is however extremely difficult for purely digital products. My generation seems very lucky to have been witnesses of this transformation for many products from the physical to the digital – providing a lot of insight to us.
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