The journal Algorithms (ISSN 1424-8220, http://www.mdpi.com/journal/algorithms) is currently running a Special Issue entitled “*Algorithms in Multi-objective Optimization*”. As the Guest Editor of this issue, we would like to invite you to contribute to this special issue. For further reading, please follow the link to the Special Issue Website at: https://www.mdpi.com/journal/algorithms/special_issues/Multi-objective_Optimization The submission deadline is 15 April 2021. You may send your manuscript now or up until the deadline. Submitted papers should not be under consideration for publication elsewhere. We also encourage authors to send a short abstract or tentative title to the Editorial Office in advance (lesley.miao@mdpi.com or algorithms@mdpi.com). /Algorithms/ is an EI, Scopus, ESCI and MathSciNet indexed Open Access (since 2008) journal, which has received its 2019 CiteScore 2.20, ranking Q2 in the category "Computer Science, Theory & Methods", and is since then rising steadily in the ranks (see https://www.journalindicators.com/indicators for an independent ranking), and is published online monthly by MDPI. For further details on the submission process, please see the instructions for authors at the journal website (http://www.mdpi.com/journal/algorithms/instructions). Please let me know *within one month* if you and your colleagues are interested in submitting a manuscript for this special issue. Your contribution would be most welcome. We are looking forward to hearing from you. Kind regards, Guest Editor Dr. Massimiliano Caramia