1989: Sharp Dial Master EL-6250H was a telephone book, memo pad, calculator and auto phone dialer with 8KB of memory. 1999: HP 6601x connected to the world via PCMCIA WiseCom 56.6kbps modem, an IR Port and a PC docking cradle. RIM Inter@active Pager 950 had a small keyboard and a full mailbox that held more than 500 contacts. Compaq iPAQ Pocket PC: Password protection similar to that of a PC. Lost your password? Hard reset required and all data was lost.”]
Source: https://www.csoonline.com/article/2124202/mobile-security–how-gadgets-evolved.html