What Boost PSI on TunerView Lite to watch?

[KensBlueGenX]

What is the difference between PSI (MAP) and PSI (TC) as displayed on KTuner v1.2 TunerView Lite? I.e. which one is the actual turbocharger pressure that it is important to not overboost?

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[KTuner]

TC is Turbo Charger pressure. MAP is Manifold Absolute Pressure. Described right in the help section covering item abbreviations.