The Journal of Pseudo-Differential Operators and Applications is a forum for high quality papers in the mathematics, applications and numerical analysis of pseudo-differential operators. Pseudo-differential operators are understood in a very broad sense embracing but not limited to harmonic analysis, functional analysis, operator theory and algebras, partial differential equations, geometry, mathematical physics and novel applications in engineering, geophysics and medical sciences. Bibliographic Data J. Pseudo-Differ. Oper. Appl. First published in 2010 1 volume per year, 4 issues per volume approx. 800 pages per volume ISSN: 1662-9981 (print) ISSN: 1662- 999X (electronic) AMS Mathematical Citation Quotient (MCQ): 0.69 (2021) .