Coding tasks are common operations for NSOs and can sometimes be challenging due to the size of nomenclatures. At Insee, a sophisticated coding tool called Sicore was developed in the 1990s to perform various classification tasks.
I suggest to reformulate:
Coding tasks are common operations for NSOs and can sometimes be challenging due to the size of statistical classifications. At Insee, a sophisticated coding system called Sicore was developed in the 1990s to perform various coding tasks.
Here:
I suggest to reformulate: