Complex sentence: Besides being unportable, like any low-level programming of the day in assembly language, this way of coding needed tincorrect instruction was typed by a programmer, there was potential for damaging equipment and data.
Split into simpler sentences: Besides being unportable, like any low-level programming of the day in assembly language, this way of coding needed to be done carefully. If an incorrect instruction was typed by a programmer, there was potential for damaging equipment and data.