Is Casio's scientific calculator still in production? Why can't I buy it in Longyan, Fujian?

No, I don't think so. Casio FX-4850 4800 engineering calculator was discontinued in March 2008. Now the upgraded product FX-5800P Fx-5800 has the same price as fx-4850, but the program cannot enjoy it. The programming language of Fx-5800 is closer to the basic programming language. 2. Change the 5800 variable input statement to? Change the assignment statement to->. Like 1850, the program can use 26 alphabetic variables A~Z to store data and additional variable memories Z[ 1], Z[2], Z[3], Z [4] ... independent of alphabetic variable memories, and can also use statistical serial memories List X, List Y and List Freq. 3. The number of program commands increased from 16 in 4850 to 34, while ⊿, ≦ = >; , {} command to pass ⊿, ≦ = > Fx-4850 program, which is composed of important program commands such as, {}, cannot run on 5800. At the same time, the conditional statement of 5800 is modified into a more easy-to-use form of If~Then~Else~IfEnd, and the conditional loop Do~LpWhile and While~WhileEnd statements are added for the ~To~Step~Next loop. 4.5800 added data communication function. Connecting the 3-3Pin communication ports of two machines with SB-62 data cable can conveniently transmit programs and data, avoiding the shortcomings that 4850 can only manually input programs and is prone to program input errors. 5.5800 has the function of matrix calculation, and can combine and solve algorithm equations when compiling strict adjustment program, which can meet the calculation requirements of surveying adjustment programming in surveying specialty. At the same time, in addition to 26 uppercase English letters, lowercase English letters and Greek letters can also be used for letter variables. Now you can get a gift package, two measurement programs, 80 imported data lines and book supporting programs/