Tagalog tl, tgl Swedish sv, swe Swahili sw, swa sustainable development goal SDG Sunday Sun., Su sulfur S subscriber identity module sim strontium Sr standard generalised markup language SGML Spanish Qualifications Framework for Lifelong Learning MECU Spanish Qualifications Framework for Higher Education MECES Spanish Network of Health Promoting Universities REUPS Spanish National Research Council CSIC Spanish es, spa south-west SW south-south-west SSW south-south-east SSE south-east SE south S sodium Na small computer system interface SCSI Slovenian sl, slv Slovak sk, slk simple mail transfer protocol SMTP silver Ag