[U-Boot] Fwd: Need a small help/info reg U-Boot.

Hello Friends! Good Morning/Day.

I am working in Samsung Research India, and I got a doubt regarding U-Boot. The below is that and please help me if you can refer some location where it is explained.

What does the prefix "fw_" means? In Uboot, we have commands like fw_setenv, fw_printenv, and even files are named with prefix fw_.

What does this fw_ really means?

few friends told me, that, It MIGHT be *firmware*. But I am not sure about this as I cant get any reference or any solid info about this.,

And I am also looking forward some resource/articles about Alternative environment used in U-Boot.

I will be so happy if you can help in anyways,