The RNA Infrastructure: An Introduction to ncRNA Networks -- RNA Interactions -- Plant RNA Silencing in Viral Defence -- MicroRNAs as Post‑Transcriptional Machines and Their Interplay With Cellular Networks -- Spatiotemporal Aspects of MicroRNA‑Mediated Gene Regulation -- Spliceosomal RNA Infrastructure: The Network of Splicing Components and their Regulation by miRNAs -- Construction, Structure and Dynamics of Post‑Transcriptional Regulatory Network Directed by RNA‑Binding Proteins -- Safe Keeping the Message: mRNP Complexes Tweaking after Transcription -- Unexpected functions of tRNA and tRNA Processing Enzymes -- Programmed DNA Elimination in Tetrahymena: A Small RNA‑Mediated Genome Surveillance Mechanism -- Long Noncoding RNA and Epigenomics -- Promoter‑Associated Long Noncoding RNAs Repress Transcription Through a RNA Binding Protein TLS -- RNA Networks in Prokaryotes I: CRISPRs and Riboswitches -- RNA Networks in Prokaryotes II: tRNA Processing and Small RNAs -- Localization of the Bacterial RNA Infrastructure -- Small RNA Discovery and Characterisation in Eukaryotes Using High‑Throughput Approaches -- How Old are RNA Networks?.