also defines: thermochemical calorie, international steam table calorie, $\pu{15^{\circ}C}$ calorie, international calorie, thermochemical calorie
https://doi.org/10.1351/goldbook.C00784
Non-SI unit of energy. There are three differently defined calories: thermochemical calorie (\(\rm{cal}_{\rm{th}} = 4.184\ \rm{J}\)), international steam table calorie (\(\rm{cal}_{\rm{IT}} = 4.1868\ \rm{J}\)), \(15\ ^{\,\unicode{x26ac}}\rm{C}\) calorie (\(\rm{cal}_{15} = 4.1855\ \rm{J}\)), however only the symbol \(\rm{cal}\) is usually used.