Omaha Public Power District (OPPD) and Nebraska Public Power District (NPPD) filed claims for tax credits under the Employment Expansion and Investment Incentive Act (the Act). The state Tax Commissioner (Commissioner) denied the claims. On appeal, the district court for Lancaster County reversed the orders of the Commissioner and remanded the matters for a determination of the amount of credits, if any, to which OPPD and NPPD might be entitled. The Commissioner and the Department of Revenue (Department) appeal.
SCOPE OF REVIEW
Statutory interpretation is a matter of law in connection with which an appellate court has an obligation to reach an independent, correct conclusion irrespective of the determination made by the court below. Vervaecke v. State, 247 Neb. 707, 529 N.W.2d 779 (1995); State ex rel. Perkins Cty. v. County Superintendent, 247 Neb. 573, 528 N.W.2d 340 (1995); In re Application of City of Grand Island, 247 Neb. 446, 527 N.W.2d 864 (1995).
Tax exemption provisions are strictly construed, and their operation will not be extended by construction. Property which is claimed to be exempt must clearly come within the provision *520granting exemption from taxation. Nebraska State Bar Found, v. Lancaster Cty. Bd. of Equal., 237 Neb. 1, 465 N.W.2d 111 (1991); Indian Hills Comm. Ch. v. County Bd. of Equal., 226 Neb. 510, 412 N.W.2d 459 (1987); Bethphage Com. Servs. v. County Board, 221 Neb. 886, 381 N.W.2d 166 (1986). Since a statute conferring an exemption from taxation is strictly construed, one claiming an exemption from taxation of the claimant or the claimant’s property must establish entitlement to the exemption. Nebraska State Bar Found, v. Lancaster Cty. Bd. of Equal., supra; Nucor Steel v. Leuenberger, 233 Neb. 863, 448 N.W.2d 909 (1989). See Bethphage Com. Servs. v. County Board, supra.
FACTS
The basic facts in this case are not in dispute. OPPD and NPPD (collectively referred to as “the utilities”) are political subdivisions of the State of Nebraska. The utilities were created and operate by virtue of chapter 70, article 6, of the Nebraska Revised Statutes, each providing electrical power within its chartered territory.
NPPD operates an electrical utility system and generates, transmits, distributes, and sells electricity within its chartered territory, which comprises 86 of Nebraska’s 93 counties and portions of 5 other counties. NPPD pays Nebraska sales and use taxes upon taxable products and services it purchases. During 1989, NPPD increased the number of employees in its business by 46 new full-time employees, as determined in accordance with Neb. Rev. Stat. § 77-27,190 (Reissue 1990), and increased its capital investment in Nebraska by $33,778,915, as determined in accordance with Neb. Rev. Stat. § 77-27,191 (Reissue 1990). Pursuant to the Act, Neb. Rev. Stat. §§ 77-27,187 to 77-27,196 (Reissue 1990), NPPD filed a claim for tax credits in the amount of $519,000 for taxes paid during 1990.
OPPD was chartered for the purpose of generating, distributing, and selling electricity to consumers in a 13-county area in eastern Nebraska. In 1989, OPPD increased its average number of employees by 163 full-time employees and increased its qualified investment by $125,219,587.81. In 1990, OPPD *521increased its employees by 81 full-time employees and increased its qualified investment by $85,374,048.90. In 1991, OPPD increased its employees by 37 full-time employees and increased its qualified investment by $78,039,515.95. Based upon these increases in employees and capital investment, OPPD filed a claim for refund of sales and use taxes paid during 1990, 1991, and 1992 in the amount of $4,268,500.
M. Berri Balka is the Commissioner, and the Department is an agency of the state created pursuant to Neb. Rev. Stat. § 77-360 (Reissue 1990). The Department contested the utilities’ claims, asserting that their activities involved the generation and distribution of electricity and, therefore, did not constitute the “manufacture” of “tangible personal property” under the Act and that the generation and distribution of electricity is not a “qualifying business” under the Act. The Department also contested the claims on the basis that the utilities improperly calculated credits claimed due on a statewide basis. The Department argued that because the utilities’ business operations are conducted in multiple locations, they do not constitute a single business location for purposes of computing credits in accordance with the Act.
A consolidated hearing on the claims was held before the Department’s designated hearing officer. Following the hearing, the Commissioner denied the claims. The Commissioner found that the generation of electricity is considered a service and, therefore, is not a “qualifying business” for purposes of the Act. The Commissioner did not address whether the activities of the utilities constituted a single business location for purposes of calculating credits under the Act.
The utilities sought judicial review in the district court under the Administrative Procedure Act, Neb. Rev. Stat. §§ 84-901 through 84-920 (Reissue 1994). The court concluded that in Nebraska, electricity is considered a product or commodity which is manufactured. The court reversed the Commissioner’s orders and remanded the matters to the Commissioner for a determination as to the amount of credits, if any, to which the utilities might be entitled. The court also noted that the issue of whether the utilities’ activities constituted a single business location had not been addressed by the Commissioner.
*522ASSIGNMENTS OF ERROR
The Commissioner and the Department allege that the district court erred in finding that the generation of electricity constituted the manufacture of tangible personal property, in finding that the utilities were engaged in a qualifying business under the Act, and in remanding the actions for further proceedings before the Commissioner to determine whether the utilities’ activities were conducted at a single business location or multiple business locations for purposes of computing credits under the Act.
ANALYSIS
The issue presented is whether the generation and distribution of electricity by the utilities constitute the manufacture of tangible personal property within the meaning of the Act. Statutory interpretation is a matter of law in connection with which an appellate court has an obligation to reach an independent, correct conclusion irrespective of the determination made by the court below. Vervaecke v. State, 247 Neb. 707, 529 N.W.2d 779 (1995). We note that tax exemption provisions are strictly construed. See Nebraska State Bar Found, v. Lancaster Cty. Bd. of Equal., 237 Neb. 1, 465 N.W.2d 111 (1991). One claiming an exemption from taxation of the claimant or the claimant’s property must establish entitlement to the exemption. Id.
The Act originated in 1986 Neb. Laws, L.B. 1124. Section 77-27,188 provides for credits against taxes imposed by the Nebraska Revenue Act of 1967 to any taxpayer engaged in a qualifying business described in § 77-27,189, which stated:
A qualifying business shall mean any business engaged in the activities listed in subdivisions (2)(a) to (g) of this section or in the storage, warehousing, distribution, transportation, or sale of tangible personal property, except that qualifying business shall not include any business activity in which eighty percent or more of the total sales are sales to the ultimate consumer of tangible personal property which is not (1) assembled, fabricated, manufactured, or processed by the taxpayer or (2) used by the purchaser in any of the following activities:
*523(a) The assembly, fabrication, manufacture, or processing of tangible personal property;
(b) The feeding or raising of livestock;
(c) The conducting of research; development, or testing for scientific, agricultural, animal husbandry, or industrial purposes;
(d) The performance of data processing, telecommunication, insurance, or financial services;
(e) Farming or ranching;
(f) The administrative management or the headquarters of any of the activities listed in subdivisions (a) to (e) of this subdivision or any activity excluded solely because of its retail sales; or
(g) Any combination of the activities listed in this section.
The Commissioner concluded that the generation of electricity is a service and, therefore, not a qualifying business under the Act. The district court concluded, as a matter of statutory interpretation, that the generation of electricity is the manufacture of tangible personal property as contemplated by the Act. To decide this case, we must determine whether the generation and distribution of electricity is a service or is the manufacture of tangible personal property.
The district court relied upon State, ex rel. Spillman, v. Interstate Power Co., 118 Neb. 756, 226 N.W. 427 (1929). The district court concluded that it was required to follow our holding that electricity is a commodity, interpreting our holding to mean that the generation of electricity by OPPD and NPPD is the manufacture of tangible personal property. The district court then concluded that OPPD and NPPD are qualifying businesses under the Act.
Analysis of Spillman
Whether electricity is tangible personal property for purposes of the Act is not controlled by our decision in Spillman, which must be observed in its particular setting. In Spillman, we held that electricity was a commodity “in the language of everyday life and in the strictly commercial sense of the term.” 118 Neb. at 771, 226 N.W. at 433. The plaintiffs petition sought to *524enjoin the defendants from putting into force a schedule of rates for electricity for the unlawful purpose of destroying the business of a competitor. The statute upon which the plaintiff relied was directed against those
“engaged in the production, manufacture or distribution of any commodity in general use that shall intentionally, for the purpose of destroying the business of a competitor in any locality, discriminate between different sections, communities, or cities of this state by selling such commodity at a lower rate in one section, community or city, than is charged for said commodity by said party in another section, community or city, after making due allowance for the difference, if any, in the grade or quality and in the actual cost of transportation from the point of production . . . .”
Spillman, 118 Neb. at 765, 226 N.W. at 431. Interstate Power Company contended that electricity or electrical energy which was supplied by them was not a commodity or a manufactured product as the terms were employed in the provisions of the laws of Nebraska upon which the State relied. We concluded that
in the language of everyday life and in the strictly commercial sense of the term, “electricity” is “produced,” “stored,” “measured,” “bought and sold.” It is moved or transported from place to place in containers or by cable. It is something that one trades or deals in. We buy it and pay for it and determine the amount of our purchases by definite and well-understood “standard.”
Id. at 771, 226 N.W. at 433. We noted that as a matter of strict definition, electricity, in the commercial sense of the term, was included within the literal terms of the statute upon which the State relied. However, neither the statute relied on in Spillman nor the term “commodity” applies to the case at bar.
Our definition of electricity in Spillman does not make clear whether electricity falls within the general definition of tangible personal property for purposes of the Act. As noted by the Commissioner, electricity is a physical phenomenon; it is energy, not matter, and has no mass. Electricity can hardly be called “tangible,” which means “capable of being touched.” See Webster’s Encyclopedic Unabridged Dictionary of the English *525Language 1452 (1989). A statute is open for construction when the language used requires interpretation or may reasonably be considered ambiguous. State v. Melcher, 240 Neb. 592, 483 N.W.2d 540 (1992).
Even if we accepted the definition of electricity in Spillman as authoritative, the Legislature has since changed the law. Spillman was issued in 1929. In 1967, the Legislature enacted the Nebraska Revenue Act of 1967. The Legislature did not use the term “commodity” to describe electricity. It treated public utilities separately from the manufacture of tangible personal property within the provisions of chapter 77. It is obvious that the Legislature, in adopting the Nebraska Revenue Act of 1967, intended to make some change in the existing law. See No Frills Supermarket v. Nebraska Liq. Control Comm., 246 Neb. 822, 523 N.W.2d 528 (1994).
Ambiguity of § 77-27,189
Neb. Rev. Stat. § 77-101 (Cum. Supp. 1994) provides: “For purposes of Chapter 77 and any statutes dealing with taxation, unless the context otherwise requires, the definitions found in sections 77-102 to 77-122 shall be used.” Tangible personal property is defined in Neb. Rev. Stat. § 77-105 (Cum. Supp. 1994) as follows: “[T]angible personal property includes all personal property possessing a physical existence, excluding money.” However, neither electricity nor tangible personal property is defined in the Act itself.
Since electricity is not specifically included or excluded as tangible personal property within the Act, we must interpret the Act. The interpretation of a statute requires the court to “determine and give effect to the purpose and intent of the Legislature as ascertained from the entire language of the statute considered in its plain, ordinary, and popular sense. . . . [E]ffect must be given, if possible, to all the several parts of a statute.” NC+ Hybrids v. Growers Seed Assn., 219 Neb. 296, 299, 363 N.W.2d 362, 365 (1985). In order for the utilities to qualify under the provisions of the Act, the purpose of the Legislature must have been to treat the generation and distribution of electricity as the manufacture of tangible personal property. If the generation of electricity is a service, then the *526utilities are not qualifying businesses within the meaning of the Act.
Whether the generation of electricity is the manufacture of tangible personal property is a question of first impression in Nebraska. A scientific discussion of the properties of electricity, while informative, is legally inconclusive and is not the way in which we will consider the question. Instead, we will consider the legislative history of the Act, and chapter 77 of the Nebraska Revised Statutes, in which the Act is found.
Legislative History
“To ascertain the intent of the Legislature, a court may examine the legislative history of the act in question.” Georgetowne Ltd. Part. v. Geotechnical Servs., 230 Neb. 22, 28, 430 N.W.2d 34, 39 (1988). The purpose of the Act is to encourage and reward the development and expansion of business in the state. The Act was not intended to provide a tax credit for all businesses that increased employment and investment, but was limited to those businesses specifically described in § 77-27,189. When the Act was amended in 1987, the Legislature’s intent was discussed at the Revenue Committee hearing.
In recent years, not too many new manufacturers, assemblers, or food processors have come into our state. So, actually, we’re . . . we’re offering this tax incentive to a few people. Most growth in recent years has been in services and retailers. By excluding retailers and service businesses we are preserving the opportunity for growth in our tax base. It has been said that new employees coming into manufacturing take five more people in services and in the retail sector to support them.
Revenue Committee Hearing, L.B. 270, 90th Leg., 1st Sess. 37 (Feb. 19, 1987). The Act was thereafter amended by 1987 Neb. Laws, L.B. 270. At the same time, the Legislature also passed 1987 Neb. Laws, L.B. 775, the Employment and Investment Growth Act, now codified as Neb. Rev. Stat. §§ 77-4101 to 77-4112 (Reissue 1990 & Cum. Supp. 1994).
A comment by Senator Elroy Hefner during the floor debate on L.B. 270 reads as follows:
*527This will give incentive to potential investment to create new jobs in Nebraska at a time when the state badly needs a boost in its economy. It requires a present or a new employer to make a significant investment initially. This would be the $100,000 minimum, and at the same time requires that at least two new jobs be created. These would be primary jobs. We know when we create primary jobs it adds to the secondary jobs. . . . It’s the creation of primary jobs that will allow for' the . . .
. . . creation of other jobs which serves [sic] the primary jobs. Let’s remember that these new employees have to pay income tax and sales tax on the services that they use. Those employees will need services, and in turn those services will hire other people. So it really does have a multiplying effect.
Floor Debate, 90th Leg., 1st Sess. 3725 (Apr. 22, 1987).
In passing the Act, the Legislature intended to encourage the creation of what were referred to as “primary jobs,” as opposed to the services that would support the primary jobs. The credits were to be used to provide an incentive to create new jobs in Nebraska and boost its economy. Our reading of the legislative history leads us to conclude that the Legislature’s purpose in passing and amending the Act was to benefit those businesses that would increase Nebraska’s capacity to produce economic goods rather than services.
Interpretation of Chapter 77
As pointed out by the Commissioner, the Legislature has historically treated public utilities separately from retailers of tangible personal property within the context of the Nebraska sales and use tax laws. In 1967, in the original draft of a bill defining tangible personal property, the Legislature included electricity within the definition of tangible personal property, but later amendments to the bill eliminated electricity from the definition. See 1967 Neb. Laws, ch. 487, § 2, p. 1543. Sales made by utilities and sales made by retailers are treated as separate types of transactions. The sales tax is imposed separately on sales of tangible personal property and the gross *528receipts from public utilities.
For example, Neb. Rev. Stat. § 77-2703(1) (Cum. Supp. 1992) provides: “There is hereby imposed a tax at the rate provided in section 77-2701.02 upon the gross receipts from all sales of tangible personal property sold at retail in this state, the gross receipts of every person engaged as a public utility . . . .” Neb. Rev. Stat. § 77-2705(2) (Cum. Supp. 1992) provides: “Every person furnishing public utility service as defined in subsection (2) of section 77-2702.07 shall register with the Tax Commissioner . . . .” Neb. Rev. Stat. § 77-2704.13 (Cum. Supp. 1992) provided:
Sales and use taxes shall not be imposed on the gross receipts from the sale . . .of:
(2) Sales and purchases of such energy sources or fuels made before October 1, 1991, or after September 30, 1992, when more than fifty percent of the amount purchased is for use directly in processing, manufacturing, or refining tangible personal property, in the generation of electricity, or by any hospital.
This section lists the generation of electricity separately from the processing, manufacturing, or refining of tangible personal property and contains a ceiling on the amount of tax that applies to manufacturers of tangible personal property, but not on taxes applying to generators of electricity. Had the Legislature considered the operation of utilities to be the same as the business of manufacturing tangible personal property, there would have been no reason to separate utilities from the general language relating to tangible personal property.
The Department has paralleled the Legislature’s intent to treat electricity as a service in Nebraska Sales and Use Tax Regulation 1-066.01, 316 Neb. Admin. Code, ch. 1, § 066.01 (1983):
The sales or use tax applies to all retail sales of gas (natural or artificial), electricity, sewer, and water by a public utility except for certain enumerated exemptions under the Nebraska Revenue Act of 1967, as amended. “Public utility” for purposes of this regulation, shall mean any person transmitting, distributing, or furnishing gas, *529electric, sewer, and water service to the public over or through a distribution system of wires, cables, conduits, pipes, mains, services, bottles, etc.
Nebraska Department of Revenue Ruling 1-86-1 (Jan. 7, 1986) states that electricity is not considered tangible personal property for purposes of the Nebraska sales and use tax laws. In McCaul v. American Savings Co., 213 Neb. 841, 331 N.W.2d 795 (1983), we held that although construction of a statute by a department charged with enforcing it is not controlling, considerable weight will be given to such a construction, particularly when the Legislature has failed to take any action to change such an interpretation.
The Department classifies electricity as a service and applies a use tax. See 316 Neb. Admin. Code, ch. 1, §§ 066.01 and 066.02 (1983). Agency regulations properly adopted and filed with the Secretary of State of Nebraska have the effect of statutory law. Slack Nsg. Home v. Department of Soc. Servs., 247 Neb. 452, 528 N.W.2d 285 (1995). Deference is accorded to an agency’s interpretation of its own regulations unless plainly erroneous or inconsistent. Id.
At this point, we must consider the burden that the utilities must sustain to prevail in their arguments. In the present case, although the Act describes a tax credit, for purposes of our analysis, we treat it the same as a tax exemption. Tax exemption provisions are strictly construed, and their operation will not be extended by construction. Nebraska State Bar Found, v. Lancaster Cty. Bd. of Equal., 237 Neb. 1, 465 N.W.2d 111 (1991). Property which is claimed to be exempt must clearly come within the provision granting exemption from taxation. Id. Since a statute conferring an exemption from taxation is strictly construed, one claiming an exemption must establish entitlement to the exemption. Id.
As we look at the manner in which electricity has been treated for taxation purposes within chapter 77, we find that the Legislature has categorized utilities as a service rather than tangible personal property. Effect must be given, if possible, to all the several parts of a statute; no sentence, clause, or word should be rejected as meaningless or superfluous if it can be avoided. State ex rel. Perkins Cty. v. County Superintendent, *530247 Neb. 573, 528 N.W.2d 340 (1995). Had the Legislature intended to treat electricity as tangible personal property, then the parallel provisions of chapter 77 would be superfluous.
In construing a statute, a court must look to the statute’s purpose and give to the statute a reasonable construction which best achieves that purpose, rather than a construction which would defeat it. See In re Guardianship & Conservatorship of Bloomquist, 246 Neb. 711, 523 N.W.2d 352 (1994). “Further, the components of a series or collection of statutes pertaining to a certain subject matter may be conjunctively considered and construed to determine the intent of the Legislature so that different provisions of an act are consistent, harmonious, and sensible.” Fecht v. The Bunnell Co., 243 Neb. 1, 3, 497 N.W.2d 50, 52 (1993). We conclude that as a general rule, chapter 77 singles out the generation of electricity for treatment separate from the treatment afforded tangible personal property. We cannot escape the conclusion that the Legislature intends the generation of electricity to be treated as a service.
CONCLUSION
Our review of the statutes, the interpretation of such statutes by regulation, and the legislative history of the Act indicate that electricity is not tangible personal property for tax purposes. We find that for purposes of the Act, the generation of electricity is a service, not the manufacture of tangible personal property, and that the utilities are not entitled to tax credits pursuant to the Act.
The Commissioner correctly determined that the generation of electricity is a service and, therefore, not a “qualifying business,” and the Commissioner was correct in disallowing the credits claimed by the utilities. The district court erred in determining that for purposes of the Act, electricity was tangible personal property. The judgment of the district court is reversed, and the cause is remanded to that court with directions to affirm the orders denying the claims of the utilities.
Reversed and remanded with directions.