It's all different, and it's a function of your leg length and your back and the contours of your back, and if I were to put sensors,  maybe 100 sensors into all of your chairs right now, I could create an index that's fairly unique to you, sort of like a fingerprint, but it's not your finger.
كلها مختلفة بسبب طول قدمك و ظهرك و وضعية ظهرك لو وضعت مئة جهاز استشعار في كل الكراسي الآن لاستطعت رسم مخطط خاص بك و كأنه بصمتك , و لكن ليس بصمة اصبعك