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Computer viruses () Persons and personal characteristics (M) Age groups (Mb) Gender (Md) Persons by educational level (Me) Families (Mf) Households (Mg) Persons by race and ethnicity (Mh) Persons by language backgrounds (Mj) Persons by socioeconomic levels (Mk) Crowds (Ml) Use For: Crowding; Overcrowding Related Term (Associative): Computer viruses (); Special events (Kht) Persons with disabilities (Mm) Use For: Disabled persons; Handicapped drivers; Handicapped persons; Mentally handicapped persons; Mentally retarded persons; People with disabilities; People with mental disabilities; Physically handicapped persons Related Term (Associative): Computer viruses (); Barrier free design (Esuh); Physical disabilities (Mxc); Low floor vehicles (Qbddkl) Immigrants (Mq) Personnel (Ms) Use For: Officials and employees Administrative and managerial personnel (Msa) Employees (Msb) Cargo handling personnel (Msc) Communications and control personnel (Msd) Construction and maintenance personnel (Mse) Education and training personnel (Msf) Engineering personnel (Msg) Firefighters (Msk) Medical personnel (Msm) Military personnel (Msn) Use For: Military drivers; Officer personnel; Officers Professional personnel (Msp) Related Term (Associative): Transportation careers (Kabknt) Novices (Msq) First responders (Msr) Scientific personnel (Mss) Specialists (Mst) Volunteers (Msv) Use For: Test volunteers Related Term (Associative): Adopt-a-highway programs (Kwh) Offenders and victims (Msw) Related Term (Associative): Loss and damage (Hw) Law enforcement and criminal justice personnel (Msx) Related Term (Associative): Criminal justice (Csijb) Groups (Msy) Vehicle personnel (Mt) Related Term (Associative): Vehicle operations (Br) Vulnerable road users (Mv) Related Term (Associative): Computer viruses () Travelers (Mw) Use For: Highway users; Travellers Human characteristics (Mx) Related Term (Associative): Computer viruses () Physical anatomy (My)