acc	AcceptedMacroheat
ARC	Arbitrary Reverse Cycle
C-Th-i	Carnot Theorem-i, i = 1,2,3
C-Th-iM	Modern Carnot Theorem-i, i = 2,3
C-Th-iME	Extension of C-Th-iM, i = 2,3
$d_{\mathrm{e}}Q,Q={\Delta }_{\mathrm{e}}Q$	Exchange Macroheat
$d_{\mathrm{e}}W,W={\Delta }_{\mathrm{e}}W$	Exchange Macrowork
Fix	Fixed (Protocol)
$\mathbb{E},ϵ$	Any Engine, Efficiency
${\mathbb{E}}^{\ast },{ϵ}^{\ast }$	Fictitious Engine, Efficiency
${\mathbb{E}}^{\mathrm{C}},{ϵ}^{\mathrm{C}}$	Carnot Engine, Efficiency
${\mathbb{E}}^{\mathrm{Im}},{ϵ}^{\mathrm{Im}}$	Imaginary Engine, Efficiency
${\mathbb{E}}^{\mathrm{Ir}},{ϵ}^{\mathrm{Ir}}$	Irreversible Engine, Efficiency
${\mathbb{E}}^{\mathrm{IrC}},{ϵ}^{\mathrm{IrC}}$	Irreversible Carnot Engine, Efficiency
${\mathbb{E}}^{\mathrm{IrS}},{ϵ}^{\mathrm{IrS}}$	Irreversible Stirling Engine, Efficiency
${\mathbb{E}}^{\mathrm{R}},{ϵ}^{\mathrm{R}}$	Reversible Engine, Efficiency
${\mathbb{E}}^{\mathrm{RC}},{ϵ}^{\mathrm{RC}}$	Reversible Carnot Engine, Efficiency
${\mathbb{E}}^{\mathrm{RC}2\mathrm{or}\nu },{ϵ}^{\mathrm{RC}2\mathrm{or}\nu }$	Two or $\nu$ ${\mathbb{E}}^{\mathrm{RC}\prime }$s in parallel, Efficiency
${\mathbb{E}}^{\mathrm{RNC}},{ϵ}^{\mathrm{RNC}}$	Reversible Non-Carnot Engine, Efficiency
${\mathbb{E}}^{\mathrm{RS}},{ϵ}^{\mathrm{RS}}$	Reversible Stirling Engine, Efficiency
${\mathbb{E}}^{\mathrm{S}},{ϵ}^{\mathrm{S}}$	Stirling Engine, Efficiency
${\mathbb{E}}_{\mathrm{mod}}^{\mathrm{S}},{ϵ}_{\mathrm{mod}}^{\mathrm{S}}$	Modified Stirling Engine, Efficiency
${ϵ}_{\mathrm{rev},\mathrm{irr}}$	Efficiency: Reversible, Irreversible Engine
${ϵ}_{\min ,\max }^{\mathrm{RC}}$	Minimum, Maximum Efficiency of ${\mathbb{E}}_j^{\mathrm{RC}}$
Fix	Fix Protocol A
hexc	Heat Exchanger
NonFix	NonFix Protocol B
NC	Non-Carnot
rej	Rejected Macroheat
WS	Working Substance