1. Introduction

2. Data and Selection of a Cluster Sample

3.1. Identifying Bright S0 Galaxies

3.2. Identification of Bars in S0s via Ellipse Fits

3.3. Identification of Bars in S0s via Visual Classification

3.4. Optical S0 Bar Fraction in the Central Region of the Coma Cluster

3.5. S0 Bar Fraction Across Different Environments

3.6. Observed and Deprojected Properties

3.7. Properties of Disks and Bars in the Coma Core

3.8. Discussion: Implications for the Evolution of S0 Bars and Disks as a Function of Environment Density

4. Bars and Disk Features in Coma Dwarfs

4.1. Identifying Dwarf Galaxies

4.2. Identifying Bars and Other Disk Features in Dwarfs

4.3. Discussion: Barred Dwarf Galaxies in the Coma Core

5. Summary