You may wonder, Sir, (for this seems a little too extravagant and Pindarical for Prose) what I mean by all this Preface […]

Duty and action are roughly equivalent to kartavya and karma respectively. In popular parlance, duty means what one should do; while karma is the sumtotal of what one did, does and will do. Duty is relative, local and subjective. Gita talks of karma, not of kartavya. How you perform your kartavya in the light of the standards of karma is your comprehension and appreciation of the Gita.

We speak of the estimator's target as an estimand (as something to be estimated) rather than just as a parameter.

Many would likely not orient their screen in a vertical or tate orientation (i.e, turned sideways as a vertical monitor) and many of these games do not have a rotation feature to support vertical/tate monitor orientation (although some do support it but then it means rotating the monitor to play and then rotating back afterward).