【正文】 eatures 16MB RAM, 256color 640x240 pixel diagonal display, Windows CE , and lithium ion battery pack giving about hours use. Price is about US$900。 20xx20xx Ken Polsson 1972 (month unknown) ? HewlettPackard introduces the HP35, the first scientific handheld calculator. [] 1973 (month unknown) ? Texas Instruments enters the pocket calculator field with the introduction of the Texas Instruments SR50 Slide Rule Calculator. It sells for about US$75. [] 1980 July 31 ? Radio Shack introduces the TRS80 Pocket Computer. It features a 24 character display, QWERTY keyboard, and KB of programmable memory. Price is US$230. [] [] [] [] (August []) (month unknown) ? Panasonic and Quasar unveil handheld puters, made by Matsushita. The units use a 1MHz 6502 CPU, and weigh 14 ounces (397 grams). [] 1981 November 10 ? Panasonic introduces The Link handheld puter, the size of a small book, with a keyboard but no display. It can be hooked up to a television or to a host puter via a telephone dialup connection. Price is US$500600. [] 1982 January ? Sharp introduces the Sharp PC1500 Hand Held Personal Computer. It es with 16 KB ROM, and KB RAM. Price for puter is US$300. Price for tiny color graphics printer that attaches to the side, US$250. [] ? Radio Shack introduces the TRS80 Pocket Computer, Model PC2, for US$280. It uses a MHz 8bit microprocessor, and has a 26character display, with upper and lower case characters. It es with 16 KB ROM, and KB RAM, expandable to 16 KB. An optional 4color printer attaches to the side. [] [] August ? HewlettPackard introduces the HP75C portable puter. It features a rechargeable battery pack, 16K RAM, 65 key keyboard, 1 line by 32 character LCD display, magic card reader, 48K ROM including BASIC interpreter, text editor, and scheduler. Size is is x 6 x inches。12 位色 RAM/ROM: 16MB/4MB FLASH 尺寸 : X X (cm) 重量 : 116g 擴(kuò)展 : SD/MMC 插槽 電池 :內(nèi)置鋰電 通訊 : USB 同步 /紅外 Tero Handspring 一個(gè)新的系列機(jī)器，中規(guī)中矩的設(shè)計(jì) 。 多彩天地 —— Palm IIIc 圖為： Palm IIIc 掌上電腦 處理器 : MOTOROLA DragonBall EZ 20MHz 操作系統(tǒng) : Palm OS 顯示屏幕 :彩色 TFT 液晶顯示 。 輕薄美麗 —— Plam V (1999) 圖為： Plam V 掌上電腦 處理器 : MOTOROLA Dragonball EZ 16 MHz 操作系統(tǒng) : PalmOS 顯示屏幕 :增強(qiáng)的屏幕技術(shù) 。 7 年間風(fēng)云變幻，讓我們通過 palm 歷史上經(jīng)典機(jī)型的回顧，來看一下 7 年間的發(fā)展變化。 Palm III 使用的是 Palm OS 操作系統(tǒng)，擁有 2M 內(nèi)存和 2M 的 Flash ROM，用戶可以升級(jí)操作系統(tǒng)。一 口氣推出了五種顏色炫麗的外型，搭配略為透明的外殼，在 Palm 業(yè)界又掀起一片波瀾 原來 palm 也可以這樣時(shí)尚美麗。 20xx 年 TRG 改名為 Handera，并推出了 Handera330，就是那個(gè) 16 級(jí)灰度， 320240 分辨率，有著軟手寫區(qū)全屏手寫的大機(jī)器，還記得看電子書時(shí)候它帶來的驚喜嗎？電池的耐力也不錯(cuò)。 Sony 在 20xx 年獲得了 palm 的授權(quán)，就像 sony 在其家用電器中的表現(xiàn)一樣，在 palm 上 Clie 更新太 快了，讓人都沒有時(shí)間對(duì)一個(gè)機(jī)型留下深刻的印象，幾乎沒留下什么經(jīng)典機(jī)型。 weight is pounds。 width is inches。 price is US$. [] ? Sharp Electronics introduces the ZR3500X handheld PC. It features Synergy operating system, x inch 320x240 monochrome LCD display, 2MB RAM, stylus, keyboard, modem, two AA batteries. Size is x x inches。 price is US$699. [] ? Palm Computing introduces the PalmPilot professional handheld PC. It features Palm OS , x inch 160x160 pixel monochrome LCD display, 1MB RAM, stylus, two AAA batteries. Size is x x inches。 size is x x inches. [] ? At the Fall Comdex show, Philips Mobile Computing Group introduces the Philips Velo 500 handheld puter. It features 16MB RAM, 16MB ROM, 75MHz 32bit MIPSbased Philips PR31700 RISC processor, two AA batteries or a nickelmetalhydride battery pack (lasting about 1215 hours), diagonal 640x240 pixel 16shade monochrome LCD display, two Miniature Card slots, 61key keyboard, modem, and Windows CE . Weight is ounces。 price is US$425. [] 1992 January 9 ? At the Winter Consumer Electronics Show, Apple Computer chairman John Sculley coins the term Personal Digital Assistant, referring to handheld puters that typically operate via a stylus on a LCD display. Sculley announces that Apple will enter the consumerelectronics market by the end of the year. [] [] [] (month unknown) ? Apple Computer and Sharp announce an agreement to codevelop a personal digital assistant, based on Apple’s software and Sharp’s hardware. [] ? At the Spring Consumer Electronics Show, Apple Computer announces the Newton pen input device. Features include: multitasking NewtOS operating system, ARM 610 processor, one PCMCIA card slot, 7 1/2 x 3 1/2 inch size, 3 x 6 inch screen, and weight of under one pound. [] [] October 14 ? At the Microprocessor Forum, ATamp。反射式背光彩色屏幕 /16 位 64K真彩 。另外，彩色屏幕帶來的不太長(zhǎng)的使用時(shí)間，串口同步的較慢的同步速度就是個(gè)問題。相信今天還有一些朋友手中擁有升級(jí)過的 8MB 的 Palm V 吧。 真正意義的現(xiàn)代 palm——Palm III(1998) 圖為： Palm III 掌上電腦 顯示屏幕 :單色 STN。無背光 處理器 : MOTOROLA Dragonball 16MHz 操作系統(tǒng) : PalmOS RAM: 128KB 尺寸 : 12 x x (cm) 重量 : 162g 通訊 :串口同步 提起 palm我們不得不提起 palm pilot1000,這個(gè)第一部的 palmpilot 電腦使用的是 Hawkins和 Dubinsky 自己開發(fā)的 Palm OS 操作系統(tǒng)，只有 128K 內(nèi)存。 RAM/ROM: 2MB/2MB Flash 尺寸 : x X 1(cm) 重量 : 113g 外殼 :鋁合金 電池 :內(nèi)置鋰電 通訊 :串口同步 /紅外 PalmV 是 Palm掌上電腦家族中體積最輕巧的一款。 RAM/ROM: 8MB/2MB FLASH 尺寸 : x x (cm) 重量 : 193g 外殼 :硬塑料 電池 :內(nèi)置鋰電 通訊 :串口同步 /紅外 Palm IIIc 是 Palm公司 20xx 年 2 月 22 日發(fā)布的最新產(chǎn)品，是該公司第一款帶彩顯的掌上電腦。另一個(gè)缺點(diǎn) sd 插槽必須打補(bǔ)丁后才可以支持 SDIO。 price is about US$20xx. [] 1991 (month unknown) ? Apple Computer petitions the FCC to allocate a 40 MHz wide band of frequencies for use with its personal digital assistants. [] September ? Chips amp。 weight is ounces。 weight is pounds。 size is x x inches。 width is inches。 price is about US$650. [] [] ? Hitachi Home Electronics ships the Hitachi Handheld PC, running Windows CE. [] ? Apple Computer unveils the eMate 300 mobile puter. [] ? Casio Computer ships the Cassiopeia, a handheld puter running Windows CE. [] December 31 ? Worldwide shipments of PalmPilot handheld puters for the year: about 350,000.