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随着信息家电的普及，智能化、网络化将会无所不在，所有这些都离不开嵌入式软件，而在嵌入式软件只中核心的莫过于RTOS（Real Time Operating System，实时操作系统）。我们都熟悉Windows这样的操作系统，但却不一定熟悉嵌入式系统中常用的RTOS。如今，微软已经推出了Windows的嵌入式版本——Windows CE。而风靡一时的Linux也在嵌入式系统中扮演着重要角色。这样看来，传统桌面操作系统和嵌入式操作系统的界线似乎也在淡化。事实究竟如何呢？让我们来听听在嵌入式软件领域颇有造诣的*是怎么说的。
用于嵌入式环境的操作系统RTOS与桌面操作系统有很多本质的不同。这些不同的特性导致产品开发的不同结果。
SQUARE D MAGNETIC SIZE 0 STARTER 3HP 8536SBO2S 8536SBO2
SQUARE D CIRCUIT BREAKER 20 AMP QOB 10K AIR 980ER23
(28) Allen Bradley + Cutler Hammer + Square D Buttons..
Square-D- Class#8501,Type L - 120-VAC Coiled Relay
SQUARE D H040-8501 AC CONTROL RELAY 120V 4 POLE 60HZ
SQUARE D MOTOR STARTING SWITCH #183
Square D Power Logic 3020/IOM-44
4 Pull Out Disconnect Switch Square D 60 Amp 240 V
SQUARE D C62B2 LIMIT SWITCH CLASS 9007 C062 SER A
SQUARE D NEMA SIZE 4 MOTOR STARTER T# SF01, CLASS 8536!
SQUARE D CIRCUIT BREAKER 20 AMP QOB 10K AIR 980ER23
Square D Motor Starters
NEW SQUARE D CIRCUIT BREAKER LOT QO 1 POLE 20AMP QO120
48PC
NEW SQ. D CIRCUIT BREAKER LOT QO 2 POLE ASST'D AMPS
15, 20, 30,40, 50, AND 60 AMP SIZES
SQUARE D H363RB 100A SAFETY SWITCH
SQUARE D H363RB 100A SAFETY SWITCH
SQUARE D SC0 3 SIZE 1 REVERSING MOTOR STARTER SC03 10HP
SQUARE D SC0 3 SIZE 1 REVERSING MOTOR STARTER SC03 10HP
SQUARE D FAL 70 AMP CIRCUIT BREAKER
SQUARE D CIRCUIT BREAKER 20 AMP QOB 22K AIR 979ER23
SQUARE D SC0 3 SIZE 1 REVERSING MOTOR STARTER SC03 10HP
SQUARE D SC0 3 SIZE 1 REVERSING MOTOR STARTER SC03 10HP
9 SQUARE D A.78 A.86 B 6.90 OVERLOAD RELAY THERMAL UNIT
Square D 30 Amp 120/240VAC Safety Switch #D211N Ser A1
(5) SQUARE D 9080 GCB-10 CIRCUIT BREAKER ASSEMBLY NIB**
NEW Square D Size 1 AC Contactor Coil 240V 2936-S1-C30A
NEW Square D Size 1 Starter Contact Kit 9998SL-3 NIB
NEW Square D Size 2 AC Contactor Coil 120V 1707-S1-T21A
SQUARE D CIRCUIT BREAKER 20 AMP QOB 10K AIR 980ER23
NEW Square D Thermal Overload Relay 9065-TF13 NIB
Square D Size 00/0/1 AC Starter Coil 600V 31041-400-62
125 AMP Load Center * 12 Space 12 Circuits * Square D *
SQUARE D SIZE 1 STARTER 8536 C0-3 CO-2 B102 SER B