E. F. Johnson Company Product. 9 1/2" x 7 1/2" color photograph of an E. F. Johnson Co. radio product, a Data Radio MRM Mobile Data Unit.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Johnson Messenger 8585 or MN 8585 Handheld.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph an E. F. Johnson Co. radio product, the Avenger SK Handheld.

E. F. Johnson Company Product in the Field. 7 1/2" x 6 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Avenger SK Handheld, being used in the field for communications for ambulance and emergency use; shown are two paramedics attending a victim, one getting radio instructions with the Avenger SK.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Avenger GX.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Avenger SE.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Johnson Multi-Net 8622.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the DMR 8000 Mobile.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Avenger SI.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking CR.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking CX, shown with flip-up cover open to reveal keypad, retractable antenna.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking CX, shown with flip-up cover closed; retractable antenna down.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking LR Mobile.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking CK Handheld.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking CM Handheld.

E. F. Johnson Company Product. 7 1/2" x 9 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking XR Handheld.

E. F. Johnson Company Product. 7" x 5" black and white photograph of an E. F. Johnson Co. radio product, the Viking SR Mobile.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking HT Mobile.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Viking GT Mobile.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger Plus 2 or Challenger Plus II, 7167 and 7187.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger Plus 7165, 7166, 7185, 7186 (20 channels)

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger 7180 (20 channels)

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger 7162 and 7182, (8 channels)

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger and the Challenger Plus Enhanced.

E. F. Johnson Company Product. 9 1/2" x 7 1/2" black and white photograph of an E. F. Johnson Co. radio product, the Challenger 7154 Low Band Mobile.