TOC 1. Comparing Containers 1.1 Cloud 1.1.1 Containers for Cloud 1.2 HPC 1.2.1 Containers for HPC 1.2.2 Docker and HPC issues 1.2.3 Parallelism and HPC containers 1.3 IoT 1.3.1 Containers for IoT 1.3.2 Docker and IoT issues 2. Comparing Solutions 2.1 Comparison Definition 2.2 Cloud Comparison 2.2.1 Docker 2.2.2 Podman 2.2.3 Singularity 2.3 HPC Comparison 2.3.1 Singularity [2.3.2 Shifter] 2.3.2 Charliecloud 2.3.3 Sarus 2.4 IoT Comparison 2.4.1 Balena 3. Comparing Performances 3.1 Comparison Definition 3.2 Cloud Comparison 3.2.1 Docker 3.2.2 Podman 3.2.3 Singularity 3.2.4 Comparison Non App 3.2.5 Comparison App 3.3 HPC Comparison 3.4 IoT Comparison 3. Interoperability